Gross to net pay calculator

What counts as a normal deduction share

For a single filer under a typical progressive income tax schedule, total deductions — income tax, payroll tax and a modest pension contribution — commonly land somewhere between a quarter and just over a third of gross pay once salary climbs past the mid five figures. Below that, payroll tax and the lowest tax brackets keep the share noticeably lighter.

A useful sanity check: if your calculated take-home is above roughly 80% of gross, either the salary is modest, the pension contribution is small, or a deduction has been left out of the numbers. If it drops below 60%, check that a high pension rate or a large 'other deductions' figure hasn't been entered twice.

The mix also shifts with income. Someone earning near the lower tax brackets loses relatively little to income tax and proportionally more to a flat payroll tax rate, while a high earner sees the opposite: payroll tax stays flat or capped while the marginal income tax rate climbs.

Three worked examples

A salary of 95,000 with a 7.65% payroll tax rate, an 8% pension contribution and 2,400 in other yearly deductions produces a pension of 7,268, taxable pay of 87,732, income tax of about 14,354, and payroll tax of 7,600. Net pay comes out to roughly 63,378 a year, or about 5,282 a month — an effective total deduction of about 33.3%.

Drop to 58,000 with a lighter 6.2% payroll rate, a 4% pension contribution and 1,200 in other deductions, and the pension is 3,596, tax on the remaining 54,404 is about 7,022, and payroll tax is 2,320. Net pay lands near 43,862 a year, about 3,655 a month, for an effective deduction of roughly 24.4% — a full nine points lighter than the previous example, mostly because less income is taxed at the higher brackets.

At 140,000 with a 7.65% payroll rate, a 10% pension contribution and 3,600 in other deductions, the pension takes 10,710, tax on the remaining 129,290 comes to about 24,072, and payroll tax is 14,000. Net pay is roughly 87,618 a year, about 7,301 a month, with the effective deduction rising to about 37.4% because a larger slice of income now sits in the higher tax brackets.

Why raising the pension rate can shrink the tax bill more than it looks

Because the pension contribution is subtracted from salary before the income tax calculation runs, every extra pound or dollar routed into a pre-tax pension lowers taxable income directly. On the 140,000 example above, raising the pension rate from 10% to 15% removes an extra 7,000 from taxable pay; at a 24% marginal rate that alone trims roughly 1,680 off the tax bill, so the actual hit to net pay is smaller than the extra contribution itself.

This is also why two people on the same gross salary can see quite different take-home figures: the one contributing more to a pre-tax pension is not just saving for later, they are also taxed on less income today.

Payroll tax, by contrast, is applied to gross salary rather than the pension-reduced figure in most schemes, so increasing pension contributions does nothing to reduce that portion of the deduction.

Where this calculation stops matching a real payslip

This model applies one flat payroll tax rate and a single progressive income tax schedule to the whole year's income. It does not model tax credits, standard deductions or personal allowances, so it will generally overstate the tax bill for lower earners and understate any benefit from itemising or claiming credits that a real return would apply.

It also assumes the payroll tax rate stays constant across all income, when many payroll taxes actually stop being withheld once pay crosses an annual cap partway through the year — meaning the true effective payroll tax rate on very high earners is usually lower than the flat rate implies.

Finally, it treats 'other deductions' as a single yearly figure. Real payslips often carry several separate lines — health insurance premiums, union dues, student loan repayments, garnishments — some of which are pre-tax and some post-tax, and mixing that up changes both the tax bill and the final net figure.

Country and timing differences worth knowing

US payroll tax bundles Social Security and Medicare, and Social Security withholding stops once wages cross the annual wage base the Social Security Administration sets each year, which changes the effective payroll deduction rate for anyone paid above that threshold partway through the year.

UK payslips instead separate Income Tax and National Insurance, apply a personal allowance that tapers away above 100,000, and calculate pension tax relief differently depending on whether the scheme uses relief-at-source or net-pay arrangements — two schemes with identical contribution rates can leave slightly different take-home pay.

Tax brackets and rates are typically only fixed for a single tax year, and many jurisdictions adjust the thresholds for inflation, so a gross-to-net figure calculated in one tax year should be re-checked at the start of the next rather than assumed to still hold.

Frequently asked questions

How do I calculate my net pay from a gross salary?

Subtract any pre-tax pension contribution from gross salary to get taxable income, run that through the applicable tax brackets to get the tax due, then subtract the tax, the payroll tax on the full gross salary, the pension contribution and any other deductions. What remains is annual net pay; divide by 12 for a monthly figure.

Why does my take-home pay feel lower than gross salary times the marginal tax rate would suggest?

Because the marginal rate only applies to the last slice of income. Someone with a marginal rate of 24% is not losing 24% of their whole salary to income tax; earlier slices are taxed at 10%, 12% and 22% first, so the effective rate on total gross pay is always lower than the marginal rate — payroll tax and pension deductions are what closes most of the remaining gap.

Does increasing my pension contribution reduce my take-home pay pound for pound?

No, because the contribution is deducted before income tax is calculated. Raising a contribution by 5,000 a year on income taxed at a 24% marginal rate reduces net pay by roughly 3,800, not the full 5,000, since the tax saved partly offsets the extra amount set aside.

What counts as 'other deductions' in a gross-to-net calculation?

Anything taken from pay outside income tax, payroll tax and pension: health or dental insurance premiums, union dues, life insurance, student loan repayments and court-ordered garnishments are the most common. Whether each one is taken before or after tax affects the final number, so a single combined figure is only an approximation.

Why is the effective deduction rate different for two people earning the same salary?

The pension contribution rate and any other deductions vary between employers and individuals even at identical gross pay, and those amounts change both taxable income and the final subtraction, so two colleagues on the same salary can see noticeably different take-home figures.

Does gross-to-net pay change during the tax year?

It can. Some payroll taxes stop being withheld once earnings cross an annual cap, which raises monthly net pay later in the year even though the salary hasn't changed, and any mid-year raise or bonus can also push part of your income into a higher tax bracket for the months that follow.

Sources

• Social Security Administration — contribution and benefit base — Annual Social Security wage base above which payroll tax withholding stops; updated for 2025.
• IRS — tax brackets and rates — Progressive federal income tax bracket thresholds and rates, current for the 2024/2025 tax years.
• HMRC — Income Tax rates and Personal Allowances — UK Income Tax bands and the personal allowance taper above 100,000, current for the 2025/26 tax year.