Engine Fuel

See how salary sacrifice, your ISA and a GIA affect your pay and your investment engine

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Warning — this is not financial advice

Tax is a complicated topic and is personal to your own circumstances. This calculator is just an illustration of how you may be able to invest your income, taking into account the general tax rules and investment wrappers available. There are tax nuances not accounted for in this calculator. For example how much unused pension annual allowance you can actually carry forward, your personal tax code, student loan repayments or other deductions. For personal tax advice please speak to a qualified financial advisor.

Engine Fuel

GP Gross Pay
T&NI Tax & National Insurance
IE Investment Engine

What’s left in your pocket is Gross Pay, minus Tax and National Insurance, minus whatever you choose to put into your Investment Engine — your pension, ISA and GIA combined.

Your numbers

£
Salary sacrifice reduces the salary your National Insurance is calculated on. Not salary sacrifice does not
The slider goes up to your income or Annual Allowance, whichever is lower: £60,000, tapering to £10,000 once income passes £260,000. To carry forward unused allowance, type a higher amount, up to £180,000 or your income
£
Capped at £20,000, or whatever’s left of your take home pay if less
£
Whatever you choose to invest from what’s left, rather than keep as spendable cash
£
Turn off if you don’t pay National Insurance on this income, for example once you’re above State Pension age

Your pay

Without investing With investing
Gross income £0 £0
Income tax £0 £0
National Insurance £0 £0
Investment engine £0 £0
Take home pay £0 £0
Monthly take home pay £0 £0
Total tax % 0% 0%

Where your income goes

Tax & National Insurance

Income tax £0
National Insurance £0

Investment engine

Pension £0
ISA £0
GIA £0
Spendable cash £0
Added to your investment engine
£0

Sustainable income

Estimated sustainable withdrawal from this year’s contribution, using safe withdrawal rate rules.

Rule Annual Monthly
3% rule £0 £0
4% rule £0 £0
5% rule £0 £0

National Insurance efficiency

Using salary sacrifice for a £0 pension contribution saves you £0 a year in National Insurance, compared to a normal payroll deduction of the same amount.

Where your investment engine money goes

Annual Monthly
Pension contribution £0 £0
ISA contribution £0 £0
GIA contribution £0 £0
Investment engine total £0 £0
Spendable cash left over £0 £0