Tax rules differ by country and change regularly. This page explains the principles that hold across systems; the specific allowances, rates and account names where you live must come from a local adviser or tax authority.
The order to use allowances
Most tax efficiency available to a private individual is achieved with a handful of ordinary allowances used in sequence. Very little of it requires a specialist.
- 1Any employer pension match. This is not a tax break, it is unclaimed pay, and it beats everything else on this list.
- 2Tax-relieved retirement saving up to the annual limit, where contributions attract relief at your marginal rate.
- 3Tax-free or tax-exempt savings and investment accounts, up to the annual allowance where one exists.
- 4Allowances that are per-person: two partners generally have two of everything, and unused allowance in one name is often wasted.
- 5Only then, general taxable accounts.
Use it or lose it
Most annual allowances do not carry forward. An allowance unused by the end of the tax year is usually gone permanently, which is why a diary reminder a month before year end is worth more than most tax planning.
Principles that hold anywhere
- Shelter the least tax-efficient assets first
- Where you can choose what goes inside a tax-free wrapper, put the things generating taxable income there and keep the more benign assets outside.
- Split between partners
- Where allowances are per-person and transfers between partners are not taxed, holding assets in the lower-taxed name is often the largest single saving available.
- Timing matters at year end
- Realising a gain in March rather than April can move it into a different tax year and a different allowance.
- Losses can be useful
- In many systems, realised losses offset realised gains. Crystallising a loss you already hold can be a deliberate act rather than an admission.
- Charitable giving is often relieved
- Where relief exists, giving efficiently costs you less for the same benefit to the charity.
Where people go wrong
| The mistake | What it costs |
|---|---|
| Choosing a poor investment because it is tax-efficient. | A bad asset in a good wrapper is still a bad asset. |
| Locking money away for relief and needing it early. | Early-access penalties frequently exceed the relief gained. |
| Leaving allowances unused every year. | The single largest avoidable loss, and entirely silent. |
| Holding everything in one partner’s name. | A whole set of allowances wasted. |
| Complex schemes marketed on tax alone. | Cost, illiquidity, and sometimes a challenge from the tax authority years later. |
| Forgetting tax on the way out. | A product taxed on withdrawal is not tax-free, it is tax-deferred. |
If tax is the main selling point, be careful
Legitimate tax efficiency is usually boring, well-known and free. Anything marketed primarily on its tax treatment deserves scepticism and independent advice before you commit.
An annual checklist
- Am I taking the full employer pension match?
- Have I used this year’s tax-free savings allowance, if one applies?
- Are assets sensibly split between partners?
- Do I have realised gains that could be offset by losses I already hold?
- Is anything sitting in a taxable account that could sit in a sheltered one?
- Have I set a reminder for a month before the tax year ends?
Documents you may also need
Financial Planning
Working out what your money is for, in the right order: an emergency fund first, then the goals with dates on them, then the long horizon.
Financial PlanningPersonal Goals
Turning "one day" into a monthly figure with a date on it: how to size a goal, where to keep the money, and what to do when you fall behind.
Financial PlanningSaving for a Child's Education
A goal with an immovable date and an eighteen-year horizon: what it costs, how the horizon changes the answer, and what to do if you are starting late.
This document was last updated on 1 August 2026. We publish the current version here at all times; superseded versions are available on request.
If anything on this page is unclear, write to us and we will explain it.