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Stocks & Shares ISA vs. SIPP Tax-Wrapper Comparison
UK Stocks & Shares ISA vs. SIPP Pension Tax Relief Calculator
Compare the 10-to-30 year net wealth return between a Stocks & Shares ISA (£20,000/year allowance, 100% tax-free withdrawals) and a SIPP Pension (20%, 40%, or 45% upfront tax relief, 25% tax-free lump sum, locked until age 57).
Load Taxpayer Profile:
Contribution & Growth Variables
ISA vs SIPP
ISA cap: £20,000/yr | SIPP cap: £60,000/yr
20-Year Net Wealth Comparison
SIPP Pension Wins
Net Advantage
+£89,720 More in SIPP
🏛️ SIPP Pension Net
Higher Rate Winner
£538,320
Includes £66,666 HMRC upfront tax relief + 25% tax-free lump sum. Locked to age 57.
🛡️ Stocks & Shares ISA
100% Flexible
£448,600
100% tax-free withdrawals at any age. Zero HMRC penalty on early access.
The Strategic UK Wealth Verdict:
For Higher Rate (40%) taxpayers, the SIPP generates £16,666 of gross invested capital for every £10,000 out-of-pocket. Even after paying 20% basic rate tax in retirement, the SIPP beats the ISA by +£89,720 in net spending power. Use ISA for pre-age 57 access and SIPP for pure compounding.