Tax — keeping more of what you build

I spent years thinking tax was something that happened to me — a number on a payslip, decided elsewhere. Then I actually read the rules and found something odd: Parliament deliberately built a set of tax-free allowances and shelters for ordinary savers, and then almost nobody uses them. This stage is about using them.

The one idea that makes tax click

You're not taxed on "your money" — you're taxed on flows: income as it arrives, interest as it's paid, dividends as they land, gains as you sell. Each flow has its own tax, its own rates, and — this is the useful part — its own tax-free allowance. On top of that sit two big shelters, the ISA and the pension, where most of those taxes simply don't apply.

Tax planning for a normal person is therefore one skill: route your money through the allowances and shelters before it ever reaches taxable space. Everything below is a variation on that.

Income tax: the bands for 2026/27

England, Wales and Northern Ireland use four bands. Each rate applies only to the slice of income inside its band — earning £51,000 doesn't tax your whole salary at 40%, just the £730 above the threshold.

Scotland is different on earned income — six bands from a 19% starter rate up to a 48% top rate, including a 45% advanced rate above £75,000. Savings and dividend income use the UK-wide rates even for Scottish taxpayers, and your tax country is set by where you live, not where you work.

The tax rise nobody announces

Those thresholds have been frozen since 2021 — and the 2025 Autumn Budget extended the freeze to April 2031. That's not neutral. Every pay rise, even one that only matches inflation, pushes more of your income into higher bands while the bands stand still. It's called fiscal drag, it's expected to raise tens of billions a year by the end of the freeze, and it's the main reason your tax bill creeps up without any Budget headline saying so. Had the personal allowance tracked inflation it would already be over £15,000.

The 60% trap

Between £100,000 and £125,140, your personal allowance is withdrawn at £1 for every £2 you earn. Combine that clawback with 40% tax and each extra pound in the window is effectively taxed at 60% — 62% with National Insurance, and higher still in Scotland. It's the most expensive band in the UK system and it isn't printed in any official rate table.

Your tax-free allowance stack

Outside any wrapper, these renew every 6 April — use them or lose them:

*By tax band: basic £1,000, higher £500, additional £0.

Notice how small the investment ones have become. The dividend allowance was £5,000 in 2017; it's £500 now. The CGT allowance was £12,300 in 2022; it's £3,000 now. Holding investments outside a wrapper gets more expensive every few years — which brings us to the wrappers.

The two big shelters

🛡️ The ISA — tax-free forever, no strings

Up to £20,000 a year in, and then no tax on anything it ever produces — no dividend tax, no CGT, no tax on interest, nothing to report to HMRC, and you can withdraw whenever you like. A LISA (£4,000 of the £20k, with a 25% government bonus) and a Junior ISA (£9,000 per child, separate from your allowance) sit inside the same family. For most people the ISA is the single most valuable line in the entire tax code.

🏦 The pension — the bigger deal, with a lock

Up to £60,000 a year (your annual allowance), with income tax relief on the way in, tax-free growth, 25% tax-free on the way out — and no access until 57 (from 2028). Stage 2 covered the machinery; the tax point is simple: for higher-rate taxpayers, and for anyone in the 60% trap or the HICBC window, the pension is usually the most powerful tax lever available.

The traps

Four places the system quietly takes more than the headline rates suggest:

• The 60% trap — £100,000 to £125,140, covered above. If a bonus lands you in it, the pension escape is worth running properly.
• HICBC — the Child Benefit clawback. Once the higher earner in a household passes £60,000, Child Benefit is clawed back at 1% per £200, gone entirely at £80,000. A one-earner £80k household loses it all; a two-earner £59k + £59k household keeps every penny. Pension contributions reduce the income that counts here too.
• Frozen thresholds — the stealth rise. Nothing to "fix", but worth pricing into every pay-rise and drawdown decision until 2031.
• Inertia in a GIA. Not a rule — a habit. Investments sitting outside a wrapper pay dividend tax above £500 and CGT above £3,000 for no reason other than nobody moved them.

Common mistakes

• Filling a GIA before the ISA. Same investments, one taxed, one not. Fill the £20,000 first.
• Not claiming higher-rate pension relief. Basic relief is automatic; the extra 20–25% often needs a Self Assessment claim. Unclaimed relief is a tip you're leaving HMRC.
• Ignoring the HICBC window. Crossing £60k with children costs real money that a pension contribution can recover.
• Wasting the CGT allowance. £3,000 of tax-free gains renews every April — bed-and-ISA uses it; doing nothing burns it.
• Missing Marriage Allowance. If one of you earns under £12,570 and the other pays basic rate, that's £252 a year, claimable and backdatable.
• Forgetting Scotland is different. Six bands, different thresholds, and the 60% trap runs hotter. Check which rules apply to you.

A few common questions

References

• GOV.UK — Income Tax rates and Personal Allowances
• House of Commons Library — Direct taxes: rates and allowances 2026/27
• GOV.UK — Tax on dividends
• GOV.UK — Capital Gains Tax allowances
• GOV.UK — High Income Child Benefit Charge
• mygov.scot — Scottish Income Tax