ANI guide
How to calculate adjusted net income from a payslip
Who this helps
What to pull from the payslip first
Why a payslip alone is not the final ANI number
What this helps you decide
1. Start with your employment pay anchor
Use gross salary and any regular bonus pattern as the starting income figure. If the payslip is monthly, annualise it before comparing against ANI thresholds.
2. Add taxable extras outside the payslip
Bank interest, dividends, property income, or side-income amounts can still matter even if the payslip itself looks clean.
3. Take off grossed-up deductions
HMRC says Gift Aid and relief-at-source pension contributions reduce ANI by the grossed-up amount, not just the cash you paid.
4. Check the threshold read, not just take-home pay
ANI matters because it drives the Child Benefit taper and the £100k personal allowance taper. That is the decision point the calculator shows clearly.
Common questions
Can I calculate ANI from a payslip?
You can get a strong starting estimate from a payslip, but ANI is not the same as a single payslip line. You still need to account for bonus, other taxable income, and any qualifying pension or Gift Aid adjustments.
Which payslip figure matters most for ANI?
The pay anchor matters, but the final ANI figure depends on the full-year income picture and the way pension contributions are being made. Taxable pay on its own is not always enough.
Do Gift Aid and private pension contributions change ANI?
Yes. HMRC treats Gift Aid and relief-at-source pension contributions on a grossed-up basis when calculating ANI, so both can move the final threshold position.
When should I switch from the guide into the calculator?
Move into the ANI calculator once you know the pay anchor, the bonus picture, and the main deductions you need to reflect. That is where the live threshold read becomes useful.
Related calculators
Use these next once the payslip starting point is clear
Adjusted Net Income calculator
Use the live calculator once you know the pay anchor and want the actual threshold read.
£100k tax trap calculator
Use this when the main question is how much ANI has drifted into the personal allowance taper band.
Gift Aid tax relief calculator
Use this when charity donations are one of the main levers that could move ANI down.
Tax and payslip planner
Move into the broader planner when you want PAYE paid, student loan, and balance-due risk in the same setup.
Save this setup in Seedli