Checking your tax against HMRC's figures

For 2024/25 and 2025/26 you can enter the figures from HMRC's tax calculation (SA302); for 2023/24 you can check one as a document (see “Checking a tax calculation document”). FLYNQD shows them next to its own, like for like, and gives the actual difference, however small.

HMRC's figures are reference only. They're never used to change FLYNQD's calculation, and no comparison is shown until FLYNQD can work out its own complete figure from what you've entered.

For Capital Gains Tax, HMRC's figure is shown but not reproduced until you've recorded the disposals behind it. FLYNQD doesn't claim to match a figure it hasn't calculated.

The 2024/25 rate adjustment

HMRC's 2024/25 return calculation applied the earlier 10% and 20% rates to every gain. If you disposed of something on or after 30 October 2024, an adjustment was added to bring it up to 18% or 24%. FLYNQD shows that step separately; until the disposal dates and gains on each side of 30 October are recorded, it reads “Awaiting disposal details”.

Why figures can differ

Something HMRC included that you haven't entered, a relief FLYNQD doesn't calculate, a different allowable cost, or rounding. A difference is a prompt to check your entries, not proof that either figure is wrong. FLYNQD isn't a filing tool; HMRC's calculation is the one that counts.

What FLYNQD doesn't model yet

You can type HMRC's figures in yourself, or check a tax calculation document on the Tax page (see “Checking a tax calculation document”). Payments shown on a document are listed under “Your HMRC payments”. Adding them to your forecast, reminders, marking them as paid and amended calculations are planned and not available.

Explore in your plan

• See your tax estimate

Related guides

• Checking a tax calculation document
• Capital Gains Tax: gains, losses and rates
• Calendar years, tax years and when tax is paid