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UK tax, pay, and household planning

See how pay, pension, and tax choices change your take-home

Start with focused UK calculators for ANI, Child Benefit charge, salary sacrifice, and take-home before you change payroll, pension contributions, or the wider household plan.

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ANI CalculatorChild Benefit ChargeSalary SacrificeAll Free Tools
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Quick salary hook

Open the ANI calculator with a real starting number.

Enter salary once, then refine cadence, bonus, pension, and Gift Aid on the next screen instead of starting from a blank form.

Good first step for the 60% trap and HICBCEvery assumption stays editable after this

We use this to prefill the next step only. You can still change cadence, bonus, pension, and other tax inputs inside the calculator.

Popular tax starting points

Choose the UK tax question you need answered first

Most people start with ANI, Child Benefit tax charge, or salary sacrifice. Each tool is built to answer one question quickly, then carry the same draft into the wider plan when you need more depth.

Adjusted Net Income Calculator

Check whether salary, bonus, pension, and Gift Aid push you into the personal allowance taper or Child Benefit taper zones.

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Child Benefit Tax Charge Calculator

Estimate how much Child Benefit is exposed at your current ANI and what gross reduction would move the higher earner back under the taper line.

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Salary Sacrifice Calculator

Compare extra pension salary sacrifice against the real take-home cost, ANI change, and payroll drag saved.

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Browse All Free Tools

Open the full Seedli tools directory for the wider tax planner, budget planner, and net worth checker.

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Need the broader tax planner instead of a focused calculator? Use the free tax and payslip planner for a broader read, or browse the full free tools directory. If you need the explanation before the calculator, start with how to calculate ANI from a payslip or the £100k tax trap guide, the pension contribution guide, or the two-income HICBC guide.

Private by Default

Plan confidently without forced bank linking or data-selling gimmicks.

Actionable Optimisation

See where money leaks happen and exactly where to intervene first.

Household Clarity

Keep partner planning fair, visible, and easy to maintain each month.