Using a pension to stay under £100,000
The £100,000 line matters because crossing it strips away your Personal Allowance, creating an effective tax rate of around 60% on income between £100,000 and £125,140. A qualifying pension contribution reduces your adjusted net income pound for pound, so it is one of the most direct ways to stay the right side of that line.
This page estimates the gross pension contribution that would bring your adjusted net income back to £100,000 for 2026/27, turning the £100k tax trap into a concrete, solvable number rather than a vague worry.
Each £1 of qualifying gross pension contribution can reduce adjusted net income by £1. That makes pension one of the most practical levers for people sitting just above the £100,000 ANI line.
How much pension it takes to stay under £100k
Pension is the cleanest lever near the £100,000 line, because every £1 of qualifying gross contribution lowers your Adjusted Net Income by £1. So if your ANI lands at £103,000, a £3,000 gross contribution brings you back to the threshold. The calculator shows that gross figure first, then what it is likely to cost you in real take-home terms.
ANI moves with the gross contribution amount
HMRC’s ANI method works from the gross amount that counts for relief. That is why the calculator focuses on the gross contribution needed to get back to the threshold.
Use the gross gap to estimate the threshold fix
If your ANI is £103,000, the planning question is often whether you are comfortable making a gross contribution of roughly £3,000 rather than just thinking vaguely about “paying more into pension”.
Why readers like this page
- It turns ANI into a practical pension target: an ANI of £108,000 needs about £8,000 gross
- It makes the £100k issue feel solvable: one clear number to aim for
- It links straight to the connected taper pages: jump to the £100k trap or childcare page
What this page is not
- It is not full pension advice
- It is not an annual allowance check
- It is not a replacement for personalised planning
Worked examples
These examples focus on the planning question most readers have: how far above £100,000 are you, and what gross pension amount could close that gap?
ANI £101,500
About £1,500 gross may be needed. A relatively small contribution can be enough when the ANI gap is narrow.
Near the line: small changes can have outsized threshold effects.
ANI £104,000
About £4,000 gross may be needed. This is the simple “close the gap to £100,000” logic many users want.
The value here: a tax threshold becomes an actionable pension figure.
ANI £112,000
The gross amount needed becomes much larger. The page is still directionally useful, but the wider pension-planning decision becomes more significant.
Bigger gaps: this stops being a quick threshold tidy-up and becomes a real planning call.
Comparing gross and net cost
The cash cost is not the same as the gross figure. HMRC rules use the gross amount for ANI, but many users also want to understand what that could mean in real out-of-pocket terms.
Why two figures: seeing gross and net side by side makes the choice clearer.
What this page does not cover
These caveats matter because pension planning can be broader than the narrow threshold question this page is solving.
Assuming the threshold question is the whole pension decision
This page is here to answer one focused ANI question. It does not replace checking annual allowance, carry forward, salary sacrifice setup or wider retirement planning.
Using the wrong contribution basis
The page uses the gross amount for ANI logic. Readers can become confused if they compare that directly with a net amount paid from take-home pay.
Use this result with the £100k and ANI pages, not in isolation
That gives you the full picture: how far over the line you are, what contribution could change it, and what the allowance taper looks like before and after.
Continue reading
Move to the connected pages that usually matter once you have the pension estimate.
Questions people usually ask
How much pension do I need to stay under £100,000?
Enough gross pension to bring your adjusted net income down to £100,000. If your adjusted net income is £108,000, a gross contribution of about £8,000 would do it.
Does every £1 of pension reduce adjusted net income by £1?
For qualifying contributions, broadly yes — it is the gross contribution that comes off your adjusted net income, not the net amount you pay.
Why does the calculation use the gross pension figure?
Because pension tax relief means the gross amount is what counts for adjusted net income. The page shows both gross and net so the target is clear.
Can salary sacrifice be used to stay under £100,000?
Yes. Salary sacrifice reduces your taxable salary before it reaches your payslip, which lowers adjusted net income in a similar way.
Will a pension contribution also help with Child Benefit or childcare?
It can. The same lower adjusted net income figure is used for the Child Benefit charge and the £100,000 childcare limit, so one contribution can help on more than one front.
Is this page pension advice?
No. This is a planning estimate to show the contribution needed to reach a £100,000 adjusted net income, not personal financial or pension advice.
| Primary source | How PayPrecise uses it | Link |
|---|---|---|
| Adjusted net income guidance | Gross-relief treatment used to reduce ANI. | View source |
| Income Tax rates and Personal Allowance | Connected £100,000 threshold pages use the current taper rule. | View source |
| Related ANI pages | Connected pages use the same ANI framework and threshold logic. | View source |
This page is designed to give you a quick, transparent estimate. It is not personal tax advice, and it does not replace checking your exact HMRC position.