Tools

SIPP tax relief calculator

See your true cost after tax relief, spot the 60% trap, and project 10-year growth. Educational only — not financial advice.

Your numbers

Already contributing £0/mo via your employer. This calculator models additional SIPP contributions on top.

Tax band
Higher rate
40% marginal
True cost / month
£300
for £500 into your pension
Annual tax saving
£2,400
basic relief auto + 20% via SA
Projected after 10 yrs
£86,542
at 7% annual growth
Of which growth
£26,542
vs £60,000 contributed

How your contribution breaks down

  • You pay (net to provider)£400/mo
  • Basic rate relief added by provider£100/mo
  • Extra 20% relief via self-assessment£100/mo
  • True cost to you£300/mo
Get your full tax strategy →

Estimates only. Assumes 2024/25 England/Wales/NI tax bands, no other allowances used, and 7% nominal annual growth. ClarityISA provides educational coaching, not regulated financial advice.

SIPP FAQs

What is a SIPP?

A Self-Invested Personal Pension (SIPP) is a UK pension wrapper that lets you choose your own investments. Contributions get tax relief at your marginal rate.

How much tax relief do I get on SIPP contributions?

Basic rate (20%) is added automatically by your provider. Higher rate (40%) and additional rate (45%) taxpayers claim the extra relief via self-assessment.

What is the annual SIPP allowance for 2025/26?

The standard annual allowance is £60,000 or 100% of your relevant UK earnings, whichever is lower. High earners may face a tapered allowance.