Pension Contribution Calculator UK
Work out how much goes into your pension each year and estimate the tax relief you receive on your contributions. Enter your gross salary along with your employee and employer contribution percentages to see a full breakdown of contributions, tax relief, and your effective cost after relief.
Tax Relief on Your Contribution
£400.00
your effective cost is £1,600.00 per year (£133.33 per month)
| Breakdown | Amount |
|---|---|
| Gross Salary | £40,000.00 |
| Your Contribution % | 5.0% |
| Employer Contribution % | 3.0% |
| Your Annual Contribution | £2,000.00 |
| Employer Contribution | £1,200.00 |
| Total into Pension | £3,200.00 |
| Tax Relief | £400.00 |
| Effective Cost to You | £1,600.00 |
| Annual Allowance Used | £3,200.00 |
| Remaining Allowance | £56,800.00 |
| Monthly Cost | £133.33 |
How Pension Tax Relief Works
Pension contributions in the UK benefit from income tax relief, making pensions one of the most tax-efficient ways to save for retirement. The government effectively refunds the income tax you would have paid on the money you contribute.
There are two main methods of providing this relief. Under “relief at source”, your contribution is deducted from your after-tax pay and the pension provider claims 20% basic rate tax relief from HMRC on your behalf. If you pay higher rate (40%) or additional rate (45%) tax, you claim the difference through your self-assessment tax return. Under the “net pay” method, your contribution is deducted from your gross salary before income tax is calculated, so you receive full relief automatically through your payroll.
In either case, the tax relief means a pension contribution costs you less than the headline amount. A basic rate taxpayer contributing £100 effectively pays only £80 out of pocket. A higher rate taxpayer pays £60, and an additional rate taxpayer pays just £55.
Annual Allowance
The annual allowance is the maximum amount that can be contributed to your pensions in a tax year while still receiving tax relief. For 2025/26, the standard annual allowance is £60,000. This limit covers the total of your own contributions, your employer's contributions, and any contributions made by a third party on your behalf.
If your “adjusted income” (broadly, your total income including employer pension contributions) exceeds £260,000, your annual allowance is tapered. It reduces by £1 for every £2 of adjusted income above £260,000, down to a minimum of £10,000. This means the taper affects those with adjusted income above £260,000, and the minimum allowance is reached at £360,000.
If you have unused annual allowance from the previous three tax years, you can carry it forward and use it in the current year. This is particularly useful if you receive a bonus or want to make a large one-off contribution.
Employer Contributions
Under the auto-enrolment rules, your employer must contribute at least 3% of your qualifying earnings into your workplace pension. Qualifying earnings are the portion of your salary between £6,240 and £50,270 per year (2025/26 thresholds). Many employers contribute more than the minimum, and some match your contributions up to a certain level.
The total minimum contribution under auto-enrolment is 8% of qualifying earnings, of which the employee must pay at least 5% (including the tax relief). If you opt to increase your contributions, your employer's share remains at the agreed level unless they offer a matching arrangement. Employer contributions do not attract income tax or National Insurance for the employee, making them a particularly efficient way to build your pension pot.
Salary sacrifice arrangements can offer additional National Insurance savings for both you and your employer. Under salary sacrifice, you agree to reduce your contractual salary and your employer pays the difference into your pension. Because the contribution is made by the employer, neither party pays NI on that amount. The trade-off is that your reduced salary may affect entitlements based on earnings, such as statutory maternity pay and mortgage affordability.
Example Calculations
The following examples show how pension contributions and tax relief work at different salary levels, assuming the employee contributes 5% and the employer contributes 3%.
£30,000 Salary
At £30,000, a 5% employee contribution is £1,500 per year. As a basic rate taxpayer, you receive 20% tax relief of £300, so your effective cost is £1,200 per year (£100 per month). Your employer adds £900 (3%), bringing the total going into your pension to £2,400 per year.
£55,000 Salary
On £55,000, your 5% contribution is £2,750. As a higher rate taxpayer, you receive 40% tax relief of £1,100, making your effective annual cost £1,650 (£137.50 per month). Your employer contributes £1,650, giving a combined total of £4,400 per year going into your pension.
£130,000 Salary
At £130,000, a 5% contribution is £6,500. As an additional rate taxpayer, you receive 45% relief of £2,925, reducing your effective cost to £3,575 per year. Your employer adds £3,900, and the total annual pension contribution is £10,400. This is well within the £60,000 annual allowance, so there is no excess charge.
Frequently Asked Questions
How does pension tax relief work in the UK?
When you contribute to a pension, you receive tax relief at your marginal rate. For most workplace pensions using relief at source, your employer deducts your contribution from your net pay and the pension provider claims back basic rate tax (20%) from HMRC automatically. If you are a higher rate (40%) or additional rate (45%) taxpayer, you claim the extra relief through your self-assessment tax return. The net effect is that a £100 pension contribution costs a basic rate taxpayer £80, a higher rate taxpayer £60, and an additional rate taxpayer £55.
What is the difference between relief at source and net pay?
With relief at source, your contribution is taken from your after-tax pay and the pension provider adds basic rate tax relief. Higher and additional rate taxpayers claim the rest via self-assessment. With net pay, your contribution is deducted from your gross salary before tax is calculated, so you receive full tax relief immediately through your pay. The end result is the same, but the timing differs. Most workplace defined contribution schemes use one or the other.
What is the annual allowance for pension contributions?
The standard annual allowance is £60,000 per tax year. This is the maximum total contributions (from you, your employer, and any third party) that benefit from tax relief. If your adjusted income exceeds £260,000, your annual allowance is tapered down by £1 for every £2 above that threshold, to a minimum of £10,000. You can carry forward unused allowance from the previous three tax years.
Can I contribute to a SIPP and get tax relief?
Yes. A Self-Invested Personal Pension (SIPP) works the same way as any other personal pension for tax relief purposes. You contribute from your after-tax income and the SIPP provider claims 20% basic rate relief from HMRC. If you pay higher or additional rate tax, you claim the extra relief through self-assessment. The annual allowance applies to all your pension contributions across all schemes combined.
How does salary sacrifice affect pension contributions?
With salary sacrifice, you agree to reduce your contractual salary and your employer pays the difference directly into your pension. Because the contribution comes from your employer rather than you, neither you nor your employer pays National Insurance on that amount. This can make salary sacrifice more tax-efficient than a standard employee contribution, particularly for higher earners. However, reducing your salary can affect other benefits such as mortgage affordability assessments and statutory pay entitlements.
What are the auto-enrolment minimum contributions?
Under auto-enrolment, the minimum total contribution is 8% of qualifying earnings, of which your employer must pay at least 3%. Qualifying earnings are the portion of your salary between £6,240 and £50,270 per year (2025/26 figures). Many employers contribute more than the minimum, and you can choose to increase your own contributions above the 5% default. You can opt out of auto-enrolment, but you will lose your employer contribution if you do.
Important Disclaimer
Pension rules, tax relief rates, and annual allowance thresholds can change. The figures produced by this calculator are estimates based on current published rates and should not be treated as financial advice. Your actual tax relief depends on your personal circumstances, tax code, and the method of relief used by your pension scheme. Consult a qualified financial adviser for advice specific to your situation.
Related Calculators
Salary Calculator
Calculate your UK take-home pay after tax and National Insurance deductions.
Self-Employed Tax Calculator
Estimate your tax bill as a sole trader or freelancer in the UK.
Day Rate to Salary
Convert your contractor day rate into an equivalent annual salary.
PayPal Fee Calculator
Work out PayPal fees for UK transactions and find out what you actually receive.