When you sell a rental property in the UK, you must report property sale HMRC 60 days from completion using HMRC's online Capital Gains Tax service. This reporting requirement applies to most property disposals and is separate from your annual Self Assessment return.

The 60-day rule caught many landlords off guard when introduced, as it significantly shortened the previous reporting timeframe. Missing this deadline triggers automatic penalties, making it crucial to understand exactly what you need to report and when.

Who Must Report Property Sales Within 60 Days?

The 60-day reporting rule applies to UK residents who sell residential property and have Capital Gains Tax to pay or potentially pay. You must report if:

  • You're selling a rental property (buy-to-let)
  • You're disposing of a second home or holiday property
  • You're selling property that wasn't your main residence throughout ownership
  • The sale results in a capital gain above the annual exempt amount (£3,000 for 2025/26)

Importantly, you must report even if you ultimately owe no CGT due to reliefs or allowances. The reporting obligation is triggered by the disposal itself, not the final tax liability.

Non-resident landlords have separate reporting requirements under the non-resident CGT regime, which also operates on a 60-day timeframe but uses different forms.

What Property Sales Are Exempt from 60-Day Reporting?

You don't need to report within 60 days if:

  • The property was your main residence throughout ownership and qualifies for full Principal Private Residence Relief
  • You're selling shares in a property company (these are reported differently)
  • The disposal is between spouses or civil partners
  • You're gifting the property to charity

However, if you previously let out your main residence or used part of it for business, you may still need to report even if some PPR relief applies.

How CGT Online Reporting Works

HMRC's CGT online reporting system is accessed through your Government Gateway account. The service guides you through calculating your capital gain and any tax due, then generates a unique reference for your return.

The online system requires specific information about your property sale:

  • Property address and description
  • Completion date (this starts your 60-day countdown)
  • Sale proceeds (contract price, not necessarily what you received)
  • Original purchase price and associated costs
  • Improvement costs during ownership
  • Selling costs (estate agent fees, legal fees, etc.)

The system calculates your taxable gain automatically, applying the annual exempt amount and any reliefs you're entitled to claim.

Step-by-Step Guide to Complete Your Property Disposal Report

Step 1: Gather Required Documentation

Before starting your report, collect:

  • Completion statement from your solicitor
  • Original purchase documentation
  • Records of improvement costs
  • Estate agent and legal fees invoices
  • Any relevant relief calculations

Step 2: Access the HMRC Property Disposal Form

Log into your Government Gateway account and select "Report and pay Capital Gains Tax on UK property". If you don't have an account, you'll need to set one up using your National Insurance number and recent tax information.

Step 3: Complete Property Details

Enter the property address, type (residential rental, second home, etc.), and ownership details. If you owned the property jointly, you'll report your share of the disposal.

Step 4: Enter Financial Information

Input the sale price, purchase price, and all allowable costs. The system will calculate your capital gain automatically. Double-check figures against your completion statement to avoid errors.

Step 5: Apply Reliefs and Allowances

The system will prompt you to claim any available reliefs, such as Private Residence Relief for periods when the property was your main home, or letting relief (though this is now very limited).

Step 6: Review and Submit

Check all details carefully before submitting. Once submitted, you'll receive a unique reference number for your return and payment details if CGT is due.

Payment Deadlines and Methods

Any Capital Gains Tax calculated must be paid within the same 60-day window. You can pay online by bank transfer, debit card, or through your HMRC online account.

If you're due a refund (perhaps because you overpaid or reliefs reduce your liability to zero), HMRC will typically process this within 6 weeks of your return being accepted.

The CGT you pay through the 60-day system is not a final settlement. You must still report the disposal on your annual Self Assessment return, where any payments made will be credited against your overall tax liability.

Penalties for Late Reporting

HMRC imposes automatic penalties for late property disposal reporting:

  • Initial penalty: £100 if you're up to 3 months late
  • Daily penalties: £10 per day after 3 months (maximum £900)
  • 6-month penalty: 5% of tax due or £300 (whichever is higher)
  • 12-month penalty: Additional 5% of tax due or £300 (whichever is higher)

These penalties apply even if you owe no CGT, as the reporting obligation exists independently of any tax liability. There's no minimum gain threshold for the reporting requirement.

Late payment of any CGT due also attracts interest charges from the original due date.

Common Reporting Mistakes to Avoid

Many landlords make errors when completing their HMRC property disposal form:

  • Using exchange date instead of completion date: The 60-day countdown starts from completion, not exchange
  • Incorrect sale proceeds: Use the contract price, not the amount you actually received after fees
  • Missing allowable costs: Include all purchase costs, improvements, and selling expenses
  • Forgetting joint ownership: If owned jointly, report your percentage share accurately
  • Overlooking partial reliefs: Even if you can't claim full PPR relief, partial relief may still apply

Multiple Property Sales and Reporting

If you sell multiple properties within a short period, each disposal must be reported separately within 60 days of its completion date. You cannot bundle multiple sales into a single report.

Portfolio landlords disposing of several properties often benefit from professional assistance to ensure all reporting deadlines are met and calculations are accurate across multiple disposals.

Record Keeping Requirements

Keep all documentation supporting your CGT calculation for at least 4 years after the disposal. This includes:

  • Purchase and sale contracts
  • Solicitors' completion statements
  • Receipts for improvements and selling costs
  • Estate agent marketing particulars
  • Any professional valuations obtained

HMRC can enquire into your return within 4 years, and having comprehensive records makes any query process much smoother.

When to Seek Professional Help

While the online system is designed for straightforward disposals, consider professional advice if:

  • The property had mixed use (residential and business)
  • You're claiming complex reliefs like gift relief or rollover relief
  • There were multiple disposals or part-disposals during ownership
  • You're unsure about improvement costs or allowable expenses
  • The property was inherited or transferred between spouses

A property accountant can help ensure your return is accurate and you're not overpaying CGT through missed reliefs or incorrectly calculated gains.

Future Changes to Property CGT Reporting

The government continues to review CGT rules and reporting requirements. From April 2027, new separate property income tax rates will apply to rental income, though these don't directly affect CGT calculations.

The trend toward shorter reporting timeframes and more detailed disclosure requirements is likely to continue, making accurate record-keeping and timely reporting increasingly important for property investors.

For landlords with multiple properties or complex situations, staying compliant with these evolving requirements often justifies the cost of professional property accounting services.