Published: June 2026 | Fact-Checked & Audited By: David Vance, CTA FCA (Chartered Tax Advisor & Accountant)
This guide is fully updated for the 2026/27 HMRC tax year. All calculations and tax rules have been audited against official UK legislation.
Workplace pensions are a standard feature of UK employment due to auto-enrolment rules. While contributing to a pension is highly beneficial for your retirement, the way it is deducted from your payslip can vary significantly depending on the scheme structure. Understanding how “Net Pay” arrangements differ from “Relief at Source” is essential for checking your tax calculations (you can estimate your contributions and employer match using our Workplace Pension Employer Calculator).
The Two Types of Pension Tax Relief
When you look at your payslip, the amount deducted for your pension might reduce your taxable income immediately, or it might be taken from your net pay, with tax relief added later. The two methods are called the Net Pay Arrangement and Relief at Source. Both achieve tax relief, but they look very different on a payslip.
Under a **Net Pay Arrangement**, your gross pension contribution is deducted from your salary before income tax is calculated. Your taxable salary is reduced, meaning you receive full tax relief automatically at your highest marginal rate. Under **Relief at Source**, the contribution is taken from your net salary after tax, and the pension provider reclaims 20% basic rate tax relief directly from HMRC, adding it to your pension pot.
Comparison Table: Net Pay vs. Relief at Source
| Feature | Net Pay Arrangement | Relief at Source |
|---|---|---|
| Deduction Timing | Pre-Tax (reduces gross taxable pay) | Post-Tax (deducted from net take-home) |
| Tax Relief Mechanism | Automatic at source (reduces tax billed) | Provider claims 20% basic tax relief from HMRC |
| Higher Rate Taxpayers | Receive full 40% relief automatically | Must claim extra 20% relief via self-assessment |
| Non-Taxpayers (under £12,570) | Receive no tax relief | Still receive 20% relief added to pension pot |
Understanding Qualifying Earnings
Another key payslip detail is how the pension percentage is calculated. Many workplace schemes do not calculate contributions on your total gross salary. Instead, they use a band of earnings called **Qualifying Earnings** (set between £6,240 and £50,270 for the 2026/27 tax year).
If you earn £30,000, and your contract states contributions are based on qualifying earnings, the first £6,240 is ignored. Your pension contribution (usually 5% employee, 3% employer) is calculated on the remaining £23,760, resulting in a lower deduction than if calculated on your full gross salary.
Frequently Asked Questions
Q: What is a Net Pay Arrangement for pensions?
A Net Pay Arrangement is a method where pension contributions are deducted before income tax is calculated. This reduces your taxable income, granting automatic tax relief at your highest marginal tax rate.
Q: What is a Relief at Source pension scheme?
Relief at Source is a pension scheme where contributions are deducted from your net take-home pay. The pension provider then claims 20% basic rate tax relief from HMRC and adds it directly to your pension pot.
Q: Do pension contributions reduce my National Insurance?
No, standard pension contributions do not reduce your National Insurance liability. You only save National Insurance on pension contributions if your employer operates a “Salary Sacrifice” pension scheme.
Q: What are pension qualifying earnings?
Qualifying earnings are a band of gross pay used to calculate auto-enrolment pension contributions. For the 2026/27 tax year, this band is set between £6,240 and £50,270.
Q: Why is my pension deduction lower than 5% of my salary?
It is lower because contributions may be calculated on qualifying earnings rather than your total gross pay. This means the first £6,240 of your earnings is excluded from the pension calculation.
Q: How do higher-rate taxpayers claim extra tax relief on pensions?
Under Relief at Source, higher-rate taxpayers must claim the extra 20% relief through self-assessment. Under a Net Pay Arrangement, the full 40% relief is applied automatically through payroll.
Q: What is the minimum auto-enrolment pension contribution?
The statutory minimum contribution is 8% of qualifying earnings. This is typically made up of a 5% employee contribution and a 3% employer contribution.
Q: Is pension contribution mandatory in the UK?
No, you have the right to opt out of your employer’s workplace pension scheme. However, doing so means you lose out on the employer contribution and government tax relief perks.
Q: What is pensionable pay vs gross pay?
Pensionable pay is the portion of your salary used to calculate pension contributions. Depending on your employer’s scheme rules, this may exclude overtime, bonuses, or commissions.
Q: Does my employer pay into my pension if I opt out?
No, if you opt out of the workplace pension, your employer is not required to make contributions. Opting out effectively means giving up “free” retirement money from your employer.