Guide

Do I Need to Report Capital Gains If No Tax Is Due? The £50,000 Rule

Reviewed by the UKCapitalGainsTaxCalculator team · Last checked 3 November 2026 Checked against GOV.UK and HMRC's 2025/26 SA108 notes

Quick answer

It depends on whether you file a tax return. If you are not in Self Assessment, you report a gain only when there is tax to pay: GOV.UK says you report and pay when your total taxable gains are above your tax-free allowance.² If you do file a return, HMRC's 2025/26 notes ask for the capital gains pages even with no tax due when the chargeable assets you disposed of were worth more than £50,000, your gains before losses were more than £3,000, or you want to claim a loss.¹

Key facts

The £50,000 test is about what the assets were worth, not the gain, so a sale at a loss can still need the pages.¹
ISA shares, gilts, Premium Bonds, private cars and personal possessions worth up to £6,000 each are left off the pages, and so is a main home fully covered by Private Residence Relief.¹
A UK resident files a 60-day UK property return only when there is tax to pay; a non-resident reports every UK property or land sale.⁴⁵
A 2025/26 loss can be claimed until 5 April 2030; you do not have to report it straight away.⁶
Not in Self Assessment with tax to pay: real-time service by 31 December 2026, pay by 31 January 2027.³

Check whether you need to report (2025/26)

For sales between 6 April 2025 and 5 April 2026, the year on the return due 31 January 2027. Enter totals for the year. Nothing you type leaves your browser.

How it works: taxable gain = gains − this year's losses − £3,000 allowance, with earlier losses used only down to the allowance, as GOV.UK describes.⁶ Not sure about the property question? Our property CGT calculator shows whether tax is due.

If you file Self Assessment: HMRC's triggers

HMRC's notes for the 2025/26 return say to fill in the Capital Gains Tax summary pages (SA108) if any of these apply:¹

you sold or disposed of chargeable assets worth more than £50,000;
your chargeable gains before taking off any losses were more than £3,000 (the annual exempt amount);
you want to claim an allowable capital loss, or make a capital gains claim or election for the year;
you have gains from an earlier year taxable in this one, or you are claiming under the foreign income and gains regime.

"Disposed of" covers more than a sale. The notes say you usually dispose of an asset when you sell it, give it away, transfer it or exchange it for something else, so a gift of shares counts as well as a sale.¹

What counts towards the £50,000?

The value of chargeable assets you disposed of. HMRC's notes do not say whether it is per asset or for the year as a whole; each section of the form asks for total disposal proceeds, so we read it as everything you disposed of in 2025/26 added together. Left out are the assets the notes say you never put on the pages: private cars, personal possessions worth up to £6,000 each, shares in ISAs and PEPs, gilts and Premium Bonds, and a main home fully covered by Private Residence Relief.¹

Three 2025/26 sellers who already file Self Assessment

Situation	Capital gains pages?
Sold a fund for £64,000 that cost £62,500: £1,500 gain, no tax	Yes: worth more than £50,000
Sold shares for £9,000 that cost £4,500: £4,500 gain	Yes: gains before losses more than £3,000
Sold shares for £8,000 that cost £11,000: £3,000 loss	Only to claim the loss, which you can do until 5 April 2030
Sold ISA shares worth £80,000	No: ISA shares are left off the pages

If you are not in Self Assessment

The £50,000 rule is part of the tax return notes, so it does not make you file a return. What matters is whether there is tax to pay.² If there is, and the gain is not on UK residential property, a UK resident can use HMRC's real-time Capital Gains Tax service: for a 2025/26 gain, report by 31 December 2026 and pay by 31 January 2027, attaching your calculations.³ The other route is to register for Self Assessment; GOV.UK says that registering after 5 October 2026 for the 2025/26 year could bring a penalty.⁸ The online return and payment are due by 31 January 2027.⁷

For the step-by-step on each route, see how to report CGT.

Property: the 60-day return is separate

A UK resident must report and pay any Capital Gains Tax due on UK residential property within 60 days of completion. With no tax to pay, there is no 60-day return.⁵ A non-resident must report all sales of UK property or land, even with no tax to pay.⁴

If you also file Self Assessment, a sale on a 60-day return goes on your tax return too: how it goes in boxes 9, 10 and 54.⁵

Losses: report them to use them

GOV.UK says you do not have to report a loss straight away, but you claim it up to 4 years after the end of the tax year of the sale. Claim it on your tax return, or write to HMRC if you have never made a gain and are not registered for Self Assessment.⁶ A loss you never claim cannot reduce a later gain. See how to claim a capital loss.

Work out the gain first

The calculator applies the £3,000 allowance and the 18%/24% split, which were the same in 2025/26 and 2026/27.

Open the CGT calculator

Frequently asked questions

Do I need to report capital gains if there is no tax to pay?

If you are UK resident and not in Self Assessment, usually not: GOV.UK says you report and pay when your total taxable gains are above your tax-free allowance. If you do fill in a Self Assessment return, HMRC's 2025/26 notes ask for the capital gains pages when you disposed of chargeable assets worth more than £50,000, your gains before losses were more than £3,000, or you want to claim a loss, even if no tax is due.

Is the £50,000 limit the sale price or the gain?

The value. HMRC's notes say chargeable assets "worth more than £50,000", so a large sale with a small gain, or a loss, can still need the pages. The notes do not say per asset or in total; the boxes ask for total disposal proceeds for each section, so we read it as everything you disposed of in the year.

Do ISA shares, Premium Bonds or my car count towards the £50,000?

No. HMRC's notes say you do not need the capital gains pages if all you sold were private cars, personal possessions worth up to £6,000 each, shares in an ISA or PEP, gilts or Premium Bonds, or a main home fully covered by Private Residence Relief. Gains on them are not taxed.

Do I have to report a capital loss?

Not straight away, but you must claim it to use it. GOV.UK says you can claim up to 4 years after the end of the tax year of the sale, so a 2025/26 loss by 5 April 2030. Claim it on your tax return, or write to HMRC if you have never made a gain and are not in Self Assessment.

I sold a buy-to-let with no CGT to pay. Do I file a 60-day return?

Not if you are UK resident: the 60-day UK property return is for a sale with tax to pay. Non-residents must report every UK property or land sale even with no tax due. If you file Self Assessment, the sale can still need the capital gains pages because of the £50,000 rule.

What if I have tax to pay but I am not in Self Assessment?

Report it. A UK resident can use HMRC's real-time Capital Gains Tax service for gains other than UK residential property: for 2025/26 gains, report by 31 December 2026 and pay by 31 January 2027. Or register for Self Assessment; GOV.UK says registering after 5 October 2026 could bring a penalty.

This page is general information, not tax advice. It reflects GOV.UK guidance and HMRC's 2025/26 Capital Gains summary notes as checked on 3 November 2026.

Sources & references

The rates, allowances and rules in this guide are drawn from the official HMRC and GOV.UK sources below, checked for the 2026/27 tax year. Each link opens the relevant government page in a new tab.

Verified against published HMRC and GOV.UK guidance.