Free UK calculators, built on a real planning engine.

Each calculator runs the same UK tax rules as a full Wealthcast plan, for one tax year.

Income tax

7 calculators

UK income tax calculator
One annual tax view across salary, dividends, savings, rental, and self-employment.
Open calculator
Net pay calculator
What your salary leaves after tax, NI, pension, and student loan.
Employment · Pension · Student loan
Bonus tax calculator
How much of a one-off bonus you keep, and what pension could change.
Employment · Pension · Student loan
Dividend tax calculator
Dividend tax on top of your other income.
Employment · Dividends
Savings interest tax calculator
Whether your savings interest is taxed, and how much.
Employment · Savings interest
Rental income tax calculator
Tax on rental profit after mortgage-interest relief.
Employment · Rental income
Student loan repayment calculator
The repayment your income triggers, by plan type.
Employment · Self-employment · Student loan

Pensions

1 calculator

Pension annual allowance calculator
How much you can still pay into pensions this tax year, with carry-forward, and any charge if you go over.
Open calculator

Calculators show one year. Wealthcast shows your whole life.

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