ISA vs pension: which comes first?

Both build wealth tax-efficiently, but they work differently — and the order you fund them matters more than most people realise.

The one-line difference

A Stocks & Shares ISA is flexible: you can access your money any time, and growth is tax-free. A pension locks your money away until later life, but rewards you with tax relief on the way in and, through work, often an employer match. Same goal — tax-efficient long-term growth — different trade-offs.

The pension's superpower: free money

Two things make a pension hard to beat. First, the employer match: many workplace pensions add money when you do — that's an instant, guaranteed return you get nowhere else. Second, tax relief: for every £80 a basic-rate taxpayer puts in, the government tops it up to £100. Turning down the match is turning down free money.

The ISA's superpower: flexibility

A pension you cannot touch until your late fifties. An ISA you can. That flexibility matters if you might need the money sooner — a house, a career break, an emergency beyond your buffer. The ISA is the accessible, no-lock-in home for tax-free growth.

The simple order for most people

1. Pension — up to the employer match. Always take the free money first.
2. Fill your ISA. Tax-free and flexible — the core of most people's investing. See the ISA explained.
3. Then more pension, or a general account. For anything beyond the first two.

Match, then ISA, then the rest. Sequence beats effort.

When to lean one way or the other

Lean pension if you have an employer match on offer or you're a higher-rate taxpayer (the tax relief is bigger). Lean ISA if you value access and flexibility, or you're saving for something before retirement. For most people, doing both — in the order above — is the answer.

The bottom line

Don't agonise over ISA versus pension — use both, in order. Grab the employer match, fill the ISA, and let time do the rest.