Corporate Tax Loss Carryforward Rules in UAE: How Long Can Losses Offset?

Corporate Tax Loss Carryforward Rules in UAE: How Long Can Losses Offset?

Corporate Tax Loss Carryforward Rules in UAE: How Long Can Losses Offset?

Comprehensive Guide to Tax Loss Management and Strategic Planning

📌 Quick Summary

The UAE's corporate tax regime allows businesses to carry forward tax losses indefinitely to offset future taxable income, providing significant relief for companies experiencing temporary setbacks. Understanding the loss carryforward rules, eligibility criteria, ownership restrictions, and strategic documentation requirements is crucial for effective tax planning. This comprehensive guide explores how businesses can maximize their tax benefits through proper loss management, compliance with Federal Tax Authority regulations, and strategic business restructuring while maintaining detailed records for audit purposes.

Introduction to Corporate Tax Loss Carryforward in UAE

The introduction of corporate tax in the United Arab Emirates on June 1, 2023, marked a significant milestone in the country's fiscal evolution. Among the various provisions designed to balance revenue generation with business-friendly policies, the tax loss carryforward mechanism stands out as a crucial relief measure for businesses navigating economic uncertainties.

Corporate tax loss carryforward is a provision that allows businesses to use losses incurred in one tax period to reduce taxable income in future profitable periods. This mechanism recognizes that business cycles are inherently volatile, and companies may experience temporary setbacks before returning to profitability. By permitting loss carryforwards, the UAE tax system acknowledges the realities of business operations and provides a fair framework for tax assessment over multiple years.

For businesses operating in the UAE, understanding these rules is not merely an academic exercise—it's a critical component of financial planning and tax strategy. The ability to carry forward losses can significantly impact cash flow, investment decisions, and overall business viability, particularly for startups, companies in high-capital-intensive industries, and businesses undergoing restructuring or expansion phases.

💡 Key Insight

The UAE's approach to tax loss carryforward is among the most generous globally, with no time limitation on how long losses can be carried forward. This unlimited carryforward period distinguishes the UAE from many jurisdictions that impose strict time limits, making it particularly attractive for long-term business planning and investment.

Need Expert Guidance on UAE Corporate Tax?

Our team of tax specialists at One Desk Solution can help you navigate corporate tax loss carryforward rules and optimize your tax position.

Understanding Tax Losses in UAE Corporate Tax Framework

What Constitutes a Tax Loss?

A tax loss occurs when a business's allowable deductions and expenses exceed its taxable income in a given tax period. In the UAE corporate tax context, this is calculated after applying all relevant deductions, exemptions, and relief mechanisms available under Federal Decree-Law No. 47 of 2022 on the Taxation of Corporations and Businesses.

Revenue Components

  • Sales revenue from goods and services
  • Interest income
  • Rental income
  • Capital gains (where applicable)
  • Foreign-sourced income

Deductible Expenses

  • Operational costs and overhead
  • Employee salaries and benefits
  • Depreciation and amortization
  • Interest on business loans
  • Professional fees and services

Non-Deductible Items

  • Fines and penalties
  • Certain entertainment expenses
  • Donations exceeding limits
  • Capital expenditures (capitalized)
  • Distributions to shareholders

Types of Losses Eligible for Carryforward

Loss Type Description Carryforward Eligibility
Trading Losses Losses from regular business operations and trading activities ✓ Eligible for unlimited carryforward
Capital Losses Losses from disposal of capital assets ✓ Can offset capital gains only
Foreign Losses Losses from foreign permanent establishments ✓ Subject to specific restrictions
Group Losses Losses from entities within a tax group ✓ Available for group relief mechanisms
Transfer Pricing Adjustments Losses resulting from TP adjustments ✓ Subject to FTA review and approval

⚠️ Important Consideration

Not all negative financial results qualify as tax losses. Losses must be computed according to UAE corporate tax provisions, which may differ from accounting losses reported in financial statements. Businesses must make proper tax adjustments to accounting profits to determine the actual tax loss available for carryforward.

How Long Can Losses Be Carried Forward in UAE?

Unlimited Carryforward Period

One of the most favorable aspects of the UAE corporate tax regime is the unlimited carryforward period for tax losses. Unlike many jurisdictions that restrict loss carryforwards to a specific number of years (commonly 5-20 years), the UAE allows businesses to carry forward losses indefinitely until they are fully utilized against future taxable profits.

Loss Carryforward Timeline Visualization

Tax Year 1: Loss Incurred

Company XYZ reports a tax loss of AED 2,000,000 due to startup costs and initial market entry expenses. This loss is documented and carried forward with no expiration date.

Loss: AED 2M

Tax Year 2-4: Continued Losses

Company continues to incur losses totaling AED 1,500,000 over three years. Cumulative loss carryforward: AED 3,500,000. All losses remain available for offset.

Cumulative Loss: AED 3.5M

Tax Year 5: First Profit

Company achieves taxable profit of AED 1,000,000. This is fully offset by carried forward losses. Remaining loss carryforward: AED 2,500,000.

29% Utilized

Tax Year 6-10: Progressive Utilization

Over five years, company generates total profits of AED 2,500,000, fully utilizing all carried forward losses. No tax liability during this period.

100% Utilized

Tax Year 11+: Normal Taxation

All losses exhausted. Company now pays standard 9% corporate tax on taxable profits. Loss carryforward benefit realized over 10-year period.

Paying Tax

Key Advantages of Unlimited Carryforward

Strategic Benefits for Businesses

  • Long-term Planning Security: Businesses can make significant capital investments knowing that initial losses won't expire before they can be utilized
  • Startup-Friendly Environment: New ventures typically require several years to achieve profitability; unlimited carryforward protects these initial investments
  • Industry Flexibility: Capital-intensive sectors like real estate development, manufacturing, and infrastructure can benefit from losses incurred during long development cycles
  • Economic Cycle Protection: Companies can weather extended economic downturns without losing valuable tax relief when conditions improve
  • Competitive Advantage: Makes UAE more attractive compared to jurisdictions with restricted carryforward periods

No Carryback Provisions

It's important to note that while the UAE allows unlimited carryforward of losses, there is no provision for carrying losses backward to previous profitable tax years. This means businesses cannot claim refunds for taxes paid in prior periods by applying current losses retrospectively. This approach simplifies tax administration while still providing substantial relief through the forward-looking mechanism.

Eligibility Criteria for Loss Carryforward

Basic Eligibility Requirements

To qualify for loss carryforward treatment under UAE corporate tax law, businesses must meet several fundamental criteria that ensure the legitimacy of the losses and maintain the integrity of the tax system.

Criteria Requirement Details
Taxable Person Status Must be subject to UAE Corporate Tax Entity must be a resident juridical person or non-resident with a permanent establishment in UAE
Proper Tax Registration Registered with Federal Tax Authority Valid Tax Registration Number (TRN) and compliance with registration obligations
Timely Filing Tax returns filed within deadlines Losses must be declared in tax return for the period in which they were incurred
Genuine Business Activity Legitimate commercial operations Losses must arise from actual business activities, not artificial arrangements
Proper Documentation Comprehensive records maintained Books of account, financial statements, and supporting documentation per UAE tax law
Compliance History No outstanding tax obligations All previous tax liabilities settled and returns filed

⚠️ Situations Where Loss Carryforward May Be Denied

  • Shell Companies: Entities with no genuine economic substance or actual business operations
  • Tax Avoidance Schemes: Losses generated through artificial arrangements designed primarily to reduce tax
  • Non-Compliant Entities: Businesses failing to maintain proper records or file required tax returns
  • Exempt Persons: Entities that qualify for corporate tax exemption cannot carry forward losses to offset future taxable income
  • Criminal Activity: Losses from illegal operations or activities prohibited under UAE law

Ownership Continuity Requirements

The 50% Ownership Test

One of the most critical conditions for maintaining loss carryforward rights in the UAE is the ownership continuity requirement. This provision is designed to prevent the trading of tax losses through the sale of loss-making companies to profitable entities—a practice known as "loss trafficking."

📊 Ownership Continuity Rule

To carry forward tax losses, a taxable person must maintain at least 50% ownership continuity. This means that at least 50% of the ownership interest must be held by the same ultimate beneficial owners who held that interest when the loss was incurred.

Scenario Ownership Change Loss Carryforward Status Explanation
Scenario A 30% ownership transferred to new investors ✓ Losses Preserved 70% continuity maintained; exceeds 50% threshold
Scenario B Exactly 50% ownership retained by original owners ✓ Losses Preserved Meets minimum threshold; losses remain available
Scenario C 51% ownership sold to new entity ✗ Losses Forfeited Falls below 50% threshold; all accumulated losses lost
Scenario D 100% ownership change due to inheritance ✓ Losses Preserved (with documentation) Special provisions may apply for family succession

⚠️ Transaction Planning Considerations

  • Conduct pre-transaction analysis to quantify loss carryforward value
  • Structure investment rounds to maintain 50%+ original ownership where possible
  • Consider staging ownership changes over multiple tax periods to maximize benefit
  • Obtain advance rulings from FTA for complex restructuring scenarios
  • Include loss carryforward valuation in business sale negotiations
  • Document all ownership changes comprehensively for FTA review

Calculating Tax Loss Carryforward

Step-by-Step Calculation Process

Determining the correct amount of tax loss available for carryforward requires systematic calculation following UAE corporate tax principles. This process ensures accurate reporting and maximizes legitimate tax relief.

Loss Carryforward Calculation Flowchart

Step 1: Determine Accounting Loss

Start with the net loss reported in audited financial statements prepared under applicable accounting standards (IFRS or other approved framework).

Example: Company ABC reports accounting loss of AED 1,500,000 for the tax period

Step 2: Make Tax Adjustments

Add back non-deductible expenses and deduct tax-exempt income to arrive at tax loss. Common adjustments include:

  • Add: Fines and penalties (AED 50,000)
  • Add: Entertainment exceeding limits (AED 30,000)
  • Deduct: Dividend income (exempt) (AED 100,000)

Adjusted Tax Loss: AED 1,500,000 + 50,000 + 30,000 - 100,000 = AED 1,480,000

Step 3: Apply Available Reliefs

Consider any additional reliefs or deductions available under specific provisions such as small business relief, qualifying activities, or group structures.

Example: No additional reliefs applicable in this case

Step 4: Calculate Carryforward Amount

The final computed tax loss becomes available for carryforward to offset future taxable profits. This amount must be declared in the corporate tax return.

Loss Available for Carryforward: AED 1,480,000

💡 Key Calculation Principles

  • Losses must be calculated according to corporate tax rules, not accounting standards alone
  • Tax adjustments must be documented with supporting evidence
  • Losses can only offset positive taxable income, not other types of income or gains unless specifically permitted
  • Partial utilization in any year reduces the carryforward balance by the amount used
  • Each loss must be tracked separately by tax year for proper application in future periods

Restrictions and Limitations on Loss Carryforward

Anti-Avoidance Provisions

While the UAE's loss carryforward rules are generous, they include several restrictions designed to prevent abuse and ensure losses are used appropriately. Understanding these limitations is crucial for compliant tax planning.

Restriction Type Description Impact on Businesses
Same Business Test Business must continue substantially the same activity that generated the loss Prevents loss trafficking; companies cannot dramatically change business models to exploit losses
Ownership Continuity (50% Rule) At least 50% of ownership must remain unchanged Restricts ability to sell companies primarily for their loss carryforward value
Transfer Pricing Adjustments Losses from non-arm's length transactions may be restricted Intercompany transactions must reflect market rates; artificial losses disallowed
Capital vs. Revenue Capital losses can only offset capital gains Segregation of loss types; revenue losses more flexible for utilization

⚠️ Transfer Pricing Compliance for Loss Preservation

  • Maintain comprehensive transfer pricing documentation
  • Ensure all intercompany transactions are at arm's length
  • Prepare contemporaneous documentation justifying pricing policies
  • Be prepared to justify losses arising from related party transactions
  • Consider advance pricing agreements for complex structures
  • Document business rationale for loss-making related party arrangements

Maximize Your Tax Loss Carryforward Benefits

Let our experienced tax consultants at One Desk Solution help you optimize your corporate tax position and ensure compliance with loss carryforward regulations.

Visit our Services Page to learn more about our comprehensive tax solutions.

Documentation and Compliance Requirements

Essential Records for Loss Carryforward Claims

Maintaining comprehensive documentation is not just a regulatory requirement—it's the foundation for successfully claiming loss carryforward relief. The Federal Tax Authority may request detailed evidence to substantiate loss claims at any time during the assessment or audit process.

Financial Documentation

  • Audited financial statements for loss periods
  • Detailed general ledgers and trial balances
  • Tax computation worksheets
  • Reconciliation between accounting and tax losses
  • Supporting schedules for all adjustments

Business Activity Evidence

  • Business plans and strategy documents
  • Evidence of actual business operations
  • Contracts, invoices, and transaction records
  • Employee records and payroll documentation
  • Market analysis and competitive positioning

Ownership Records

  • Share register and ownership certificates
  • Ultimate beneficial ownership documentation
  • Corporate structure charts
  • Records of any ownership changes
  • Shareholder agreements and amendments

Tax Compliance Evidence

  • All filed corporate tax returns
  • Tax registration certificates
  • Correspondence with Federal Tax Authority
  • Payment records for any tax due
  • Any advance rulings or clarifications obtained
Document Type Minimum Retention Period Recommended Retention Format
Tax Returns 7 years from end of relevant tax period Until losses fully utilized + 7 years Electronic and physical copies
Financial Statements 7 years Until losses fully utilized + 7 years Audited copies in approved format
Supporting Documentation 7 years Until losses fully utilized + 7 years Electronic archives acceptable with proper security
Ownership Records 7 years after any change Permanent retention recommended Official certified documents

Strategic Tax Planning with Loss Carryforward

Optimizing Loss Utilization

Effective tax planning goes beyond simply claiming losses—it involves strategic decisions about business structure, timing of income and expenses, and long-term corporate strategy to maximize the value of loss carryforwards.

Income Acceleration Strategies

Concept: Accelerate recognition of taxable income in periods with available loss carryforwards

  • Consider early revenue recognition where permitted
  • Realize capital gains when losses are available
  • Plan asset disposals to utilize losses
  • Time dividend repatriations strategically

Expense Deferral Tactics

Concept: Defer deductible expenses to future periods when losses are exhausted

  • Delay discretionary capital expenditures
  • Time major repairs and maintenance
  • Consider bonus payment timing
  • Manage inventory valuation methods

Group Structure Optimization

Concept: Utilize tax group provisions to share losses across entities

  • Form tax groups where eligible
  • Transfer losses between group members
  • Consolidate operations strategically
  • Plan intra-group transactions efficiently

Business Restructuring

Concept: Restructure operations while preserving loss carryforwards

  • Plan mergers considering loss preservation
  • Structure acquisitions to retain losses
  • Consider business reorganizations
  • Obtain advance rulings for complex changes

For comprehensive guidance on corporate tax deductions and strategic planning, explore our detailed article on Corporate Tax Deductions for Service Companies.

UAE vs. International Loss Carryforward Rules

Global Perspective on Tax Loss Treatment

Understanding how the UAE's loss carryforward provisions compare with other major jurisdictions provides valuable context for international businesses and helps highlight the UAE's competitive advantages.

Jurisdiction Carryforward Period Carryback Allowed Ownership Restrictions Key Features
🇦🇪 UAE Unlimited No 50% continuity required Most generous period globally; encourages long-term investment
🇺🇸 United States Unlimited No (previously 2 years) Complex §382 limitations Changed in 2018; 80% income offset limit annually
🇬🇧 United Kingdom Unlimited 1 year (£2M limit) Major change in ownership restrictions Flexible loss relief rules with carryback option
🇩🇪 Germany Unlimited 1 year Forfeiture above 50% ownership change €1M annual minimum offset allowed; excess limited to 60%
🇸🇬 Singapore Unlimited No Shareholding & business continuity tests Similar to UAE; shareholder test and same business test
🇨🇳 China 5 years No Legal person continuity Limited period; special provisions for high-tech enterprises (10 years)
🇮🇳 India 8 years No Change in shareholding restrictions Limited period; unabsorbed depreciation can be carried forward indefinitely
🇸🇦 Saudi Arabia Unlimited (post-2020) No Business continuity required Recently changed from limited to unlimited carryforward

Practical Case Studies

Case Study 1: Technology Startup Journey

Background

Company: TechInnovate LLC, a Dubai-based software development startup

Initial Investment: AED 3,000,000 in Year 1

Business Model: SaaS platform with 3-year development cycle before market launch

Loss Carryforward Timeline

Year Revenue Expenses Tax Loss Cumulative Loss CF
Year 1 (2023) AED 0 AED 2,500,000 AED 2,500,000 AED 2,500,000
Year 2 (2024) AED 200,000 AED 3,000,000 AED 2,800,000 AED 5,300,000
Year 3 (2025) AED 800,000 AED 2,200,000 AED 1,400,000 AED 6,700,000
Year 4 (2026) AED 4,000,000 AED 2,500,000 Profit: AED 1,500,000 AED 5,200,000
Year 5 (2027) AED 8,000,000 AED 4,000,000 Profit: AED 4,000,000 AED 1,200,000
Year 6 (2028) AED 12,000,000 AED 6,000,000 Profit: AED 6,000,000 AED 0

Key Outcomes

  • Total Losses Incurred: AED 6,700,000 over first three years
  • Years to Full Utilization: 3 additional years (Years 4-6)
  • Tax Saved: AED 603,000 (6,700,000 × 9%)
  • Cash Flow Benefit: Company achieved profitability without tax burden for 3 years post-breakeven
  • Strategic Advantage: Unlimited carryforward period allowed patient capital deployment

Best Practices for Loss Management

Comprehensive Loss Management Framework

Successful utilization of tax loss carryforward provisions requires systematic approaches to documentation, planning, and compliance. Implementing best practices from the outset protects valuable tax assets and ensures optimal benefit realization.

1. Proactive Documentation

  • Establish documentation systems from day one
  • Create loss carryforward tracking spreadsheets
  • Maintain contemporaneous records of business decisions
  • Document all ownership changes immediately
  • Prepare annual reconciliation between accounting and tax losses

2. Strategic Business Planning

  • Incorporate loss utilization into business forecasts
  • Model different scenarios for loss absorption timing
  • Coordinate major transactions with tax advisors
  • Value losses in M&A due diligence
  • Plan ownership changes with 50% rule in mind

3. Compliance Excellence

  • File all tax returns on time without fail
  • Declare losses in the period they occur
  • Maintain FTA registration in good standing
  • Respond promptly to any FTA inquiries
  • Conduct internal reviews before external audits

4. Professional Advisory

  • Engage qualified tax advisors early
  • Obtain advance rulings for complex situations
  • Regular compliance health checks
  • Stay updated on regulatory changes
  • Seek clarification from FTA when uncertain

⚠️ Critical Mistakes That Jeopardize Loss Benefits

  • Failure to Declare Losses: Not reporting losses in the tax return for the period incurred can forfeit carryforward rights
  • Inadequate Documentation: Missing records make it difficult to substantiate losses during FTA audits
  • Ownership Change Oversights: Executing transactions without considering the 50% threshold can inadvertently forfeit all losses
  • Business Activity Shifts: Dramatically changing business operations without FTA consultation risks same business test failure
  • Transfer Pricing Neglect: Failing to maintain arm's length pricing can result in loss disallowance upon review

For businesses seeking comprehensive support with their UAE corporate tax obligations, including loss carryforward management, visit our Services Page to explore how One Desk Solution can assist you.

Frequently Asked Questions About UAE Corporate Tax Loss Carryforward

Q1: How long can I carry forward tax losses in the UAE?

The UAE allows businesses to carry forward tax losses indefinitely with no time limitation. This is one of the most generous provisions globally, distinguishing the UAE from jurisdictions like China (5 years) or India (8 years). There is no expiration date for carried forward losses, meaning they remain available until fully utilized against future taxable profits. However, businesses must maintain the required ownership continuity (at least 50% of the same ultimate beneficial owners) and continue substantially the same business activity to preserve these losses. This unlimited carryforward period makes the UAE particularly attractive for startups, capital-intensive businesses, and companies in cyclical industries where losses may take many years to fully absorb.

Q2: What happens to my tax losses if I sell more than 50% of my company?

If ownership changes result in less than 50% continuity of the ultimate beneficial owners who held ownership when the losses were incurred, all accumulated tax losses are forfeited and cannot be carried forward. This 50% ownership continuity requirement is a critical anti-avoidance provision designed to prevent "loss trafficking"—the practice of buying loss-making companies solely to absorb profitable income. The test examines ultimate beneficial ownership, not just immediate shareholders, so complex corporate structures don't circumvent the rule. However, there are exceptions for certain legitimate business restructurings, family succession planning, and insolvency rescue situations where the Federal Tax Authority may permit loss preservation despite ownership changes. It's crucial to consult with tax advisors before executing any transaction that could affect ownership structure if you have accumulated losses, as proper planning can structure deals to preserve these valuable tax assets worth 9% of the loss amount.

Q3: Can I carry back losses to previous profitable years and claim a refund?

No, the UAE corporate tax system does not allow loss carryback provisions. Losses can only be carried forward to offset future taxable income; they cannot be applied retrospectively to previous tax periods to claim refunds for taxes already paid. This differs from some jurisdictions like the United Kingdom (1-year carryback up to £2 million) or Germany (1-year carryback) that offer this immediate cash benefit. While the lack of carryback means businesses cannot obtain immediate tax refunds when losses occur, the unlimited carryforward period provides substantial long-term relief. The forward-only approach simplifies tax administration and provides certainty for government revenue planning while still offering generous relief to businesses through the indefinite carryforward mechanism. Strategic tax planning should focus on optimizing the timing of income and expenses in future periods to maximize the benefit of carried forward losses.

Q4: Do I need to maintain specific documentation to claim loss carryforward benefits?

Yes, comprehensive documentation is absolutely essential for claiming and defending loss carryforward benefits. You must maintain audited financial statements, detailed tax computation workpapers showing the reconciliation between accounting and tax losses, complete ownership records demonstrating the 50% continuity requirement, evidence of genuine business operations that generated the losses, and all filed corporate tax returns. These records must be retained for at least 7 years, though it's recommended to keep them until all losses are fully utilized plus an additional 7 years. The Federal Tax Authority can audit loss claims at any time, and inadequate documentation can result in loss disallowance. Best practices include implementing systematic archiving procedures from the first day of loss incurrence, using secure electronic document management systems with proper backups, maintaining clear audit trails linking losses to specific business activities, preparing annual loss carryforward schedules tracking utilization across years, and documenting all ownership changes contemporaneously. For complex situations or significant loss amounts, consider engaging professional tax advisors to ensure your documentation meets all regulatory requirements and will withstand FTA scrutiny.

Q5: How do Free Zone entities use tax loss carryforwards if they qualify for 0% tax rate?

Free Zone entities that qualify for the 0% corporate tax rate on qualifying income face unique considerations regarding loss carryforward. Since qualifying income is already taxed at 0%, losses from such activities provide limited immediate benefit. However, these losses remain valuable in several scenarios: (1) if the entity generates non-qualifying income taxed at the standard 9% rate, losses can potentially offset this income subject to specific rules; (2) if the entity later loses its qualifying status, accumulated losses become immediately valuable; (3) losses may be relevant for group tax calculations if the entity is part of a tax group; and (4) proper loss tracking maintains compliance and provides options for future business evolution. Free Zone businesses should carefully segregate qualifying and non-qualifying income and expenses, maintain detailed records of all activities, track losses separately by type, understand which losses can offset which income streams, and plan long-term strategy considering potential changes in business model or tax status. The Federal Tax Authority has specific guidance on Free Zone loss treatment, and entities should seek professional advice to navigate these complex provisions effectively, particularly when dealing with mixed qualifying and non-qualifying activities or anticipating business changes.

Ready to Optimize Your Corporate Tax Strategy?

Don't leave valuable tax benefits on the table. Our expert team at One Desk Solution specializes in UAE corporate tax planning, loss carryforward management, and comprehensive compliance services.

Contact Us | View All Services | Visit Homepage

About One Desk Solution

One Desk Solution is your trusted partner for corporate tax compliance, business setup, and financial advisory services in the UAE. With deep expertise in UAE corporate tax law and regulations, we help businesses navigate complex tax provisions including loss carryforward rules, optimize their tax positions, and ensure full compliance with Federal Tax Authority requirements.

Contact Information:
📞 Phone: +971-52 797 1228
💬 WhatsApp: +971-52 797 1228
🌐 Website: www.onedesksolution.com
📧 Services: View Our Services
📝 Contact: Get in Touch

© 2024 One Desk Solution. All rights reserved. | Professional Tax & Business Advisory Services in UAE
Disclaimer: This article provides general information about UAE corporate tax loss carryforward rules and should not be considered as legal or tax advice. Specific situations may require professional consultation. Always consult with qualified tax advisors for guidance on your particular circumstances.

Scroll to Top