Pension guide
Pension contribution calculator UK
Who this helps
Who should use the pension contribution page
Why pension is usually the first ANI lever to test
What this helps you decide
ANI is the threshold figure that matters
If the problem is HICBC or the personal allowance taper, contribution size should be judged against ANI, not just pension enthusiasm.
Contribution route changes the take-home cost
Salary sacrifice can reduce National Insurance as well as ANI, while private pension routes usually work differently.
The target is often a very specific number
Many people do not need a vague pension uplift. They need enough gross contribution to move back below a known threshold line.
Budget still has to survive the contribution
A tax-efficient contribution is not useful if the monthly cashflow no longer works, which is why Seedli links pension back into budget and take-home.
Common questions
Do pension contributions reduce adjusted net income?
Yes. Qualifying pension contributions can reduce adjusted net income, which is why they are often used to reduce Child Benefit charge exposure or move back below the personal allowance taper.
Is salary sacrifice the same as a private pension contribution?
No. Both can reduce ANI when they are set up correctly, but salary sacrifice works through payroll and can also reduce employee National Insurance.
When is a pension contribution calculator useful?
It is most useful when you want to judge the real take-home cost of extra pension funding against a specific threshold problem like HICBC or the £100k taper.
Should I check ANI before increasing pension contributions?
Usually yes. ANI tells you whether the contribution is solving the threshold problem you actually care about, rather than just increasing pension saving in the abstract.
Related calculators
The best next tools once pension is the likely fix
Adjusted Net Income calculator
Use the ANI calculator when you need the exact gap above or below the threshold before setting a contribution target.
Salary sacrifice calculator
Use the payroll comparison when employer salary sacrifice is genuinely available and take-home cost is the main question.
Salary sacrifice vs SIPP vs relief at source
Use this when route choice matters as much as the contribution amount itself.
Tax and payslip planner
Move into the broader tax planner when you want the contribution tested against PAYE, student loan, and balance-due risk.
Save this setup in Seedli