Pension Tax Relief Calculator — How Much Tax Relief Do You Get?

Pension tax relief is one of the UK’s best tax perks. Here’s how to understand and calculate what you’re entitled to.

How Pension Tax Relief Works

The Basic Concept

Tax Rate	You Pay	Government Adds	Goes Into Pension
Basic rate (20%)	£80	£20	£100
Higher rate (40%)	£60	£40	£100
Additional rate (45%)	£55	£45	£100

In Reverse (What £100 Costs You)

Tax Rate	To Get £100 in Pension	You Pay
Non-taxpayer	£100	£80 (get 20% relief anyway)
Basic rate (20%)	£80	£80
Higher rate (40%)	£100	£60
Additional rate (45%)	£100	£55

Two Methods of Tax Relief

Relief at Source

Feature	Details
How it works	Scheme adds 20% automatically
You contribute	Net amount (after relief)
HMRC pays	20% to your pension
Higher rate relief	Claim via tax return
Who uses this	Most personal pensions, SIPPs

Example — Relief at source:

• You want £100 in pension
• You pay £80
• Scheme claims £20 from HMRC
• £100 goes into your pension

Net Pay Arrangement

Feature	Details
How it works	Contributions taken before tax
You contribute	Gross amount
Tax savings	Automatic (not taxed)
Higher rate relief	Automatic
Who uses this	Many workplace schemes

Example — Net pay:

• You earn £100
• £100 goes straight into pension
• You’re not taxed on this £100
• All relief happens automatically

How to Know Which You’re On

Check	Method
Payslip	Does contribution come before tax calculation?
Scheme documents	Should state which method
Employer/provider	Ask directly

Calculating Your Tax Relief

Basic Rate Taxpayer (20%)

Calculation	Example
You want to contribute	£200/month
Relief at source:
You actually pay	£160
HMRC adds	£40
Total in pension	£200
Net pay:
You pay from gross	£200
Tax saving (automatic)	£40
What it “costs” you	£160

Higher Rate Taxpayer (40%)

Calculation	Example
Contribution	£500/month
Basic relief (automatic)	£125 (20%)
Total in pension	£625
Higher rate relief (claim)	£125 (extra 20%)
Actual cost to you	£375

Remember: Higher rate relief isn’t added to your pension — it reduces your tax bill.

Additional Rate Taxpayer (45%)

Calculation	Example
Contribution	£1,000
Basic relief (automatic)	£250 (20%)
Total in pension	£1,250
Higher rate relief (claim)	£250 (extra 20%)
Additional rate relief	£62.50 (extra 5%)
Total relief	£562.50
Actual cost	£687.50

Quick Reference Tables

What You Pay to Get £1,000 in Your Pension

Tax Rate	Scheme Type	You Pay	Relief
Basic (20%)	Either	£800	£200
Higher (40%)	Relief at source	£800 + claim £200 back	£400
Higher (40%)	Net pay	£600	£400
Additional (45%)	Relief at source	£800 + claim £250 back	£450
Additional (45%)	Net pay	£550	£450

Annual Contribution Examples

Monthly Contribution	Annual Total in Pension	Annual Cost (Basic Rate)	Annual Cost (Higher Rate)
£100	£1,500	£1,200	£900
£200	£3,000	£2,400	£1,800
£500	£7,500	£6,000	£4,500
£1,000	£15,000	£12,000	£9,000

*Assumes relief at source — pay £X, scheme adds 25%.

Claiming Higher Rate Tax Relief

Who Needs to Claim?

Situation	Need to Claim?
Basic rate taxpayer	No — automatic
Higher rate with net pay	No — automatic
Higher rate with relief at source	Yes — claim
Additional rate with relief at source	Yes — claim

How to Claim

Method	Details
Self assessment	In pension contributions section
Not filing return?	Ask HMRC to adjust tax code
Contact HMRC	If not in self assessment

Claim Via Self Assessment

1. Enter total contributions made (after basic rate relief already added)
2. System calculates additional relief
3. Tax bill reduced or refund issued

Claim Without Self Assessment

1. Contact HMRC
2. Provide pension contribution evidence
3. They’ll adjust your tax code
4. Get relief through reduced tax

Don’t forget to claim! Many higher rate payers miss out on hundreds or thousands in relief.

Annual Allowance

Standard Allowance (2025/26)

Allowance	Amount
Annual limit	£60,000
Or	100% of UK earnings (if less)

Carry Forward

Rule	Details
Use unused allowance	From previous 3 tax years
Must have been member	Of a pension in those years
Use current year first	Then oldest unused

Example:

Tax Year	Allowance	Contributions	Unused
2022/23	£40,000	£10,000	£30,000
2023/24	£60,000	£20,000	£40,000
2024/25	£60,000	£30,000	£30,000
2025/26 available	£60,000 + £100,000 carried forward = £160,000

Tapered Annual Allowance

Situation	Details
Who it affects	High earners (adjusted income over £260,000)
Reduction	£1 for every £2 over threshold
Minimum	£10,000 annual allowance

Employer Contributions

How They’re Treated

Feature	Details
Tax relief	Not needed (no tax paid on them)
NI saved	Both you and employer
Count towards annual allowance	Yes
Free money	Essentially

Salary Sacrifice

What it is	Trade salary for pension
Income tax saved	Yes
NI saved	Yes (both parties)
Employers often share NI saving	Extra pension contribution
Very tax efficient	Combined savings significant

Scotland Tax Rates

Different Relief Calculation

Scotland Tax Band	Rate	Relief When Claiming
Starter rate	19%	Claim back 19%
Basic rate	20%	Claim back 20%
Intermediate	21%	Claim back 21%
Higher	42%	Claim back 42%
Advanced	45%	Claim back 45%
Top rate	48%	Claim back 48%

Note: Relief at source still only adds 20% — Scottish taxpayers claim the difference via self assessment.

Non-Taxpayers

Still Get Tax Relief

Rule	Details
Can contribute	Up to £3,600 gross per year
Only pay	£2,880
Relief added	£720
Regardless of	Earnings or age

Great for:

• Non-working spouses
• Children
• Low earners

Common Questions

Can I Contribute More Than I Earn?

Situation	Rule
Standard	Limit is 100% of earnings
Non-earner	£3,600 gross (£2,880 net) maximum
Above limit	Charge applies

Can I Backdate Claims?

Timeframe	Possibility
4 tax years	Can claim back missed higher rate relief
Contact HMRC	To make backdated claim

When Is Tax Relief Worth More?

Scenario	Best Time to Maximise
Higher earning years	Contribute more then
Before retirement	If income dropping
When bonuses received	Sacrifice bonus to pension

Summary

Key Point	Remember
Basic rate	20% automatic
Higher rate	Claim extra 20%
Additional rate	Claim extra 25%
Annual allowance	£60,000 (2025/26)
Carry forward	Up to 3 years unused
Don’t forget	Claim higher rate relief