The best way is to follow the tax-free hierarchy:
1) Employer pension (free matching!),
2) LISA (if under 40),
3) SIPP (tax relief),
4) ISA (flexible)
Anything after that can utilise other tax allowances like dividends and capital gains allowances in your taxed GIA.
Tip: Use our flowchart to decide.
👉 Look at Week 8 for more on the decision heirarchy.