Grow your pension contributions towards 15%
You've claimed your employer's full pension match — Step 2 done. Your emergency fund is in place, your high-interest debt is cleared, and your ISA is open. Now it's time to look at whether your pension contributions are genuinely on track, or just on autopilot.
The auto-enrolment minimum of 8% total (3% from your employer, 5% from you) was designed as a floor to get people saving — not as a target. For most people starting pension saving in their 30s or later, 8% is likely to produce a retirement income significantly below what they expect. The widely cited target is 15% total — yours and your employer's combined.
The good news: tax relief makes increasing your contributions far cheaper than the numbers suggest. A basic rate taxpayer only pays 68p for every £1 that goes into their pension via salary sacrifice. A higher rate taxpayer pays just 49p.
Why 8% isn't enough
The 8% auto-enrolment minimum is calculated on qualifying earnings — not your full salary. Qualifying earnings are banded between £6,240 and £50,270. So if you earn £35,000, contributions are calculated on £28,760 (£35,000 minus £6,240). That's already less than 8% of your actual salary.
Beyond the calculation quirk, the deeper problem is what 8% actually produces in practice.
The full State Pension in 2026 is £12,548 per year — a starting point, not a living standard. If you're aiming for a retirement income of £25,000–£35,000 per year, you need your private pension to make up a significant gap. At 8% contributions from age 30, it won't.
The 15% target — where it comes from
The 15% rule of thumb has been widely cited by financial planners, industry bodies, and the Pensions Commission for years. It represents total contributions — your share plus your employer's — as a percentage of your gross salary.
A simple way to think about it: aim to contribute a percentage equal to half your age. At 30, target 15%. At 40, target 20%. At 50, target 25%. This accounts for the fact that starting later means less time for compounding to work, so you need to save more aggressively.
These are targets, not rules. If your employer contributes 8% or 10%, you may already be close. If you have a defined benefit pension (NHS, teachers, civil service), the maths is different — check your pension scheme's accrual rate before applying these numbers.
How tax relief makes this cheaper than it looks
The single most misunderstood part of pension saving is how much it actually costs you. Because of income tax relief, the money going into your pension is not the same as the money leaving your pocket.
When you contribute to a pension, you get tax relief at your marginal rate. For a basic rate taxpayer, every £1 that goes into your pension costs you 80p. For a higher rate taxpayer, it costs 60p. And if you contribute via salary sacrifice, you also save National Insurance — bringing the effective cost down further.
The exact saving depends on your tax rate, whether your employer offers salary sacrifice, and whether they pass on any employer NI savings. But the principle holds: every extra pound in your pension costs you materially less than a pound.
If you earn above £50,270, you pay 40% income tax on earnings above that threshold. An extra £1 into your pension via salary sacrifice saves you 40% income tax and 2% NI — meaning £1 in your pension costs you just 58p. Higher rate pension relief is one of the most valuable tax benefits available in the UK. Don't leave it unused.
Salary sacrifice — how it works
Salary sacrifice is the most tax-efficient way to contribute to your workplace pension. Instead of taking your full salary and then contributing from it, you agree with your employer to take a lower salary — and your employer pays the difference directly into your pension as an employer contribution.
The result: you don't pay income tax or National Insurance on the sacrificed amount. For a basic rate taxpayer contributing an extra £200/month, that's a saving of roughly £56/month in combined tax and NI — money that stays in your pension rather than going to HMRC.
Most large employers offer salary sacrifice. Ask your HR or payroll team. If yours doesn't, you still get income tax relief automatically through the relief-at-source or net pay arrangement your scheme uses — you just miss out on the NI saving.
The Autumn 2025 Budget announced that from April 2029, salary sacrifice NIC relief will be capped at £2,000 per year. Contributions above £2,000 via salary sacrifice will attract National Insurance for both you and your employer. This doesn't affect the income tax relief on pension contributions, which remains unlimited (up to the annual allowance). For most people on typical salaries contributing at moderate rates, the £2,000 cap won't bite — but it's worth understanding if you're a higher earner making large voluntary contributions.
How to actually increase your contributions
Find out your current contribution rate
Check your payslip. It should show your employee contribution percentage and the employer contribution. Add them together. If the total is below 15%, there's a gap to close.
Check what your employer will match
Some employers will increase their contribution if you increase yours — beyond the auto-enrolment minimum. This is free money. Before contributing to an ISA or SIPP, confirm you're extracting every pound of employer match available.
Ask HR to increase your employee contribution
Most workplace pension schemes let you increase your contribution at any time, in increments. Even 1% more today makes a compounding difference over 20–30 years. Ask to use salary sacrifice if it's available — it's almost always worth it.
Redirect pay rises directly to your pension
The painless way to increase contributions: every time you get a pay rise, direct some or all of it into your pension before you get used to having it. You never miss money you never see. Even directing half of each raise closes the gap without touching your current lifestyle.
Consider a SIPP for additional contributions
If your workplace scheme has limited investment options, or you want to contribute beyond what your employer administers, a Self-Invested Personal Pension (SIPP) lets you make additional contributions with full tax relief. You claim basic rate relief automatically and can claim higher rate relief via Self Assessment.
What 15% looks like in practice
| Salary | 8% total (minimum) | 15% total (target) | Extra monthly cost to you* |
|---|---|---|---|
| £25,000 | £167/month | £313/month | ~£99/month |
| £35,000 | £233/month | £438/month | ~£137/month |
| £45,000 | £300/month | £563/month | ~£176/month |
| £60,000 | £400/month | £750/month | ~£147/month† |
*After 20% income tax relief and 8% NI saving via salary sacrifice. †Higher rate taxpayer saving 40% tax + 2% NI on contributions above £50,270.
Claiming higher rate relief — the forgotten step
If you're a higher rate taxpayer and your pension contributions go through a relief-at-source scheme (common in workplace pensions and SIPPs), you automatically get 20% basic rate tax relief added to your contributions. But the additional 20% higher rate relief doesn't arrive automatically — you have to claim it via Self Assessment.
Many people miss this every year. On £10,000 of pension contributions, that's £2,000 unclaimed. Over a working career, this can run to tens of thousands of pounds.
Register for Self Assessment at GOV.UK if you haven't already. In your tax return, enter your pension contributions in the pension section — HMRC will calculate the additional relief and either reduce your tax bill or issue a repayment. Keep your pension statements as evidence of contributions made.
If you have a defined benefit pension
The 15% target is designed for defined contribution pensions — the type where your pot grows based on what you put in. If you're in a defined benefit (DB) scheme (NHS, teachers, civil service, police, some private sector), the calculation is completely different.
DB pensions promise a fraction of your salary for each year of service — typically 1/49th or 1/60th per year. To check whether your DB pension is on track, look at your annual pension statement and estimate the annual income it will produce at retirement. Then compare that to what you'd want to live on, and fill any gap with ISA contributions or a SIPP top-up.
Don't compare your DB pension to the 15% rule. Instead, use your scheme's online modeller or annual statement to estimate your retirement income. If there's a gap, bridge it with ISA contributions (tax-free access) rather than additional pension contributions — you'll want the flexibility.
Don't forget the State Pension
The full new State Pension is worth £12,548 per year in 2026, rising each year under the triple lock (higher of inflation, earnings growth, or 2.5%). You need 35 qualifying National Insurance years to receive the full amount. Check your forecast at gov.uk/check-state-pension.
If you have gaps in your NI record — from career breaks, time abroad, or years of low earnings — you may be able to buy additional qualifying years. At current rates, buying a missing year costs around £923 and is worth approximately £358 per year in additional State Pension for life. For most people, that's an exceptional return.