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Swealth

How we work the numbers

Every calculation on this site is arithmetic you could do yourself. This page says exactly what it does, where each outside figure comes from, and what we have chosen that you might reasonably choose differently.

At a glance

Registered figures
38
Each links to its source
Every one
Next recheck falls due
2027-01-31

The rules we hold ourselves to

  1. 01

    Every figure that comes from outside — a tax threshold, an allowance, a statistic — is registered with its source and a date by which it must be checked again. If that date passes, the site fails to build. A stale number is not something anyone notices by reading a page.

  2. 02

    Nothing that touches tax or pensions is published without a named reviewer who is qualified to check it. Pieces that have been written but not yet reviewed say so at the top, are kept out of our sitemap and ask search engines not to index them.

  3. 03

    Every article declares how it is paid for — editorial, affiliate, sponsored or partner — and that declaration is part of the file, not a note someone remembers to add.

  4. 04

    Assumptions are always shown, always editable, and never called forecasts.

A kitchen table by a window with a mug of tea, reading glasses and an open book.

Net worth

Net worth is everything you own less everything you owe. The arithmetic is trivial; the judgement is entirely in what counts as which. Three of ours are worth arguing about.

Student loans sit outside the headline figure

A UK student loan is repaid at a fixed percentage of income above a threshold, collected through payroll, and written off after a set period regardless of the balance. Somebody earning below the threshold repays nothing and the balance is still cancelled at the end. That is the behaviour of a tax, not a debt, and including it makes a large number of people appear poorer than they are in any sense that affects their lives.

We show the balance separately and offer a tick box to include it, because the opposite view is defensible: a high earner who will clear the loan inside the term really is paying real interest on real money.

Final salary pensions go in at transfer value

A defined benefit pension has no pot, so there is no self-evident number. We use the cash equivalent transfer value, because it is the only figure schemes publish. It is a flawed measure: it is what a scheme will pay to be rid of an obligation, which for most members is less than the obligation is worth to them. Treat it as the bottom of a range.

Property goes in at what it would sell for

Not what you paid, and not what the index says your street is worth. Selling costs are not deducted, so equity is a little optimistic — by a few per cent of the property value.

Projections

The projection engine converts your annual growth rate to its true monthly equivalent — (1 + r) to the power of one twelfth, less one — rather than dividing it by twelve. Dividing by twelve and compounding monthly turns a 12 per cent assumption into an effective 12.68 per cent, and compounds that error every year after. It makes every projection look better than it should. We do not do it.

Contributions are added at the end of each month, after that month’s growth, which is the conservative convention.

Every projection is shown twice: in cash, and in today’s money after inflation. The second is smaller and more useful. Returns are an assumption you set, not a forecast we make, and no allowance is made for platform charges, fund charges or tax outside a wrapper — so real outcomes will be lower than a projection at the same rate.

Where our figures come from

This is the complete list of outside figures the site relies on, with what each one says, who published it, and the date it is next checked. Grouped by area, and closed by default — open the ones you want. Every entry is in the page whether or not it is expanded.

Running a company7

Corporation tax on company profits.

19% up to £50,000, 25% above £250,000, with marginal relief in between

GOV.UK, Corporation Tax rates · Current rates · checked again by 2027-03-01

Both thresholds are divided by the number of associated companies, so a second company can raise the rate on the first.

Tax rates on dividends above the allowance.

Basic 10.75%, higher 35.75%, additional 39.35%

GOV.UK, Tax on dividends · 6 April 2026 to 5 April 2027 · checked again by 2027-03-01

The basic and higher rates rose for 2026 to 2027. Any salary-versus-dividend sum built on the old numbers is out of date.

Dividend income you can receive before tax.

£500

GOV.UK, Tax on dividends · 2026 to 2027 tax year · checked again by 2027-03-01

Employer National Insurance and the threshold it starts at.

15% on earnings above a secondary threshold of £5,000 a year

GOV.UK, Rates and thresholds for employers · 6 April 2026 to 5 April 2027 · checked again by 2027-03-01

A director paying themselves a salary pays this on top of income tax and employee NI.

The reduction in an employer's annual National Insurance bill.

£10,500

GOV.UK, Rates and thresholds for employers · 2026 to 2027 tax year · checked again by 2027-03-01

Not available to a company whose only employee is a single director.

The turnover at which VAT registration becomes compulsory.

£90,000 of taxable turnover in the last 12 months, or expected in the next 30 days

GOV.UK, When to register for VAT · Current threshold · checked again by 2027-03-01

Rolling 12 months, not your accounting year.

The reduced capital gains rate when selling a business.

18% on qualifying disposals from 6 April 2026, up from 14% in 2025 to 2026 and 10% before that

GOV.UK, Business Asset Disposal Relief · Disposals from 6 April 2026 · checked again by 2027-03-01

The rate has risen twice in two years. Any exit plan built on 10% is out of date.

Self-employed2

National Insurance for the self-employed.

Class 4 at 6% on profits from £12,570 to £50,270 and 2% above; Class 2 treated as paid once profits reach £7,105

GOV.UK, Self-employed National Insurance rates · 2026 to 2027 tax year · checked again by 2027-03-01

Below £7,105 you can pay voluntary Class 2 to protect your State Pension record.

Extra tax-free savings interest for people with low other income.

Up to £5,000, reduced as other income rises

GOV.UK, Tax on savings interest · 2026 to 2027 tax year · checked again by 2027-03-01

Often overlooked by company directors taking a small salary.

Income tax4

Income tax rates and bands in England, Wales and Northern Ireland.

Nil to £12,570, 20% to £50,270, 40% to £125,140, then 45%

GOV.UK, Income Tax rates and Personal Allowances · 2026 to 2027 tax year · checked again by 2027-03-01

Scotland sets its own bands and rates.

How the personal allowance is withdrawn above £100,000.

£12,570, reduced by £1 for every £2 of adjusted net income above £100,000, and nil at £125,140

GOV.UK, Income Tax rates and Personal Allowances · 2026 to 2027 tax year · checked again by 2027-03-01

Produces an effective 60% marginal rate on income between £100,000 and £125,140 in England, Wales and Northern Ireland. Scottish rates differ.

What adjusted net income is, and what reduces it.

Total taxable income before personal allowances, less certain reliefs including pension contributions and Gift Aid

GOV.UK, High Income Child Benefit Charge · 2026 to 2027 tax year · checked again by 2027-03-01

Includes foreign income. It is not the same as gross salary or taxable pay.

Class 1 National Insurance deducted from an employee's pay.

Category A: 8% on earnings between £12,570 and £50,270, then 2% above

GOV.UK, rates and thresholds for employers 2026 to 2027 · 2026 to 2027 tax year · checked again by 2027-03-01

A director's National Insurance is worked out over the whole tax year rather than pay period by pay period, which is why a director's salary can be planned against the annual thresholds.

Pensions2

The standard annual allowance for tax-relieved pension contributions.

£60,000

GOV.UK · 2026 to 2027 tax year · checked again by 2027-03-01

Tapers down where threshold income is over £200,000 and adjusted income is over £260,000.

The incomes at which the pension annual allowance starts to taper.

Threshold income over £200,000 and adjusted income over £260,000

GOV.UK, Pension annual allowance · 2026 to 2027 tax year · checked again by 2027-03-01

Both tests must be met before the allowance is reduced.

ISAs and investing6

The total that can be paid into ISAs in a tax year.

£20,000

GOV.UK · 2026 to 2027 tax year · checked again by 2027-03-01

The annual Junior ISA subscription limit.

£9,000

GOV.UK, Junior Individual Savings Accounts · 2026 to 2027 tax year · checked again by 2027-03-01

The child can take control at 16 and withdraw at 18. It is their money, not yours.

Lifetime ISA limits and the government bonus.

£4,000 a year, with a 25% bonus up to £1,000 — and it counts towards the £20,000 ISA limit

GOV.UK, Lifetime ISA · 2026 to 2027 tax year · checked again by 2027-03-01

Pay in before 50, open before 40. Withdrawing for anything other than a first home or age 60 carries a charge.

The capital gains tax-free allowance.

£3,000 (£1,500 for trusts)

GOV.UK, Capital Gains Tax allowances · 2026 to 2027 tax year · checked again by 2027-03-01

Capital gains tax rates on most assets.

18% within the basic rate band, 24% above it, on gains made from 6 April 2026

GOV.UK, Capital Gains Tax rates · Gains made from 6 April 2026 · checked again by 2027-03-01

Savings interest you can receive before tax.

£1,000 basic rate, £500 higher rate, nil additional rate

GOV.UK, Tax on savings interest · 2026 to 2027 tax year · checked again by 2027-03-01

Property4

Stamp duty on a home you will own outright, England and Northern Ireland.

Nil to £125,000, 2% to £250,000, 5% to £925,000, 10% to £1.5m, then 12%

GOV.UK, Stamp Duty Land Tax residential rates · Current rates · checked again by 2027-03-01

Scotland and Wales charge their own taxes instead.

First-time buyer stamp duty relief.

Nothing up to £300,000, 5% from £300,001 to £500,000, and no relief at all above £500,000

GOV.UK, Stamp Duty Land Tax residential rates · Current rates · checked again by 2027-03-01

A cliff: one pound over £500,000 and the whole relief goes.

The surcharge on an additional residential property.

5% on top of the standard rates

GOV.UK, Stamp Duty Land Tax residential rates · Current rates · checked again by 2027-03-01

The stamp duty surcharge for a buyer who is not resident in the UK, England and Northern Ireland.

2% on top of all other residential rates, including the zero rate

GOV.UK, Rates of Stamp Duty Land Tax for non-UK residents · Purchases from 1 April 2021 · checked again by 2027-03-01

Residence here is not the same test as for income tax. A buyer is non-resident for this purpose if they were present in the UK on fewer than 183 days in the 12 months before the purchase — and a refund can be claimed if they then spend 183 days here in the 12 months after it. It stacks with the additional-property surcharge rather than replacing it.

Passing it on5

The inheritance tax nil-rate band, and the rates above it.

£325,000, then 40% — or 36% where at least 10% of the net estate goes to charity

GOV.UK · 2026 to 2027 tax year · checked again by 2027-03-01

The additional allowance when a home passes to direct descendants.

Up to £175,000

GOV.UK · Unchanged since the 2020 to 2021 tax year · checked again by 2027-03-01

Reduced by £1 for every £2 an estate is worth above the £2 million taper threshold.

Gifts you can make each year that leave your estate immediately.

£3,000 a year, and one unused year can be carried forward

GOV.UK, Inheritance Tax gifts · Current rules · checked again by 2027-03-01

Small gift and wedding gift exemptions.

£250 per person per year; weddings £5,000 to a child, £2,500 to a grandchild, £1,000 to anyone else

GOV.UK, Inheritance Tax gifts · Current rules · checked again by 2027-03-01

The £250 cannot be combined with another allowance for the same person.

How tax on a gift falls away over seven years.

Within 3 years 40%, 3 to 4 years 32%, 4 to 5 years 24%, 5 to 6 years 16%, 6 to 7 years 8%, then nothing

GOV.UK, Inheritance Tax gifts · Current rules · checked again by 2027-03-01

Taper relief only applies where gifts made in the seven years before death exceed the £325,000 threshold. It reduces tax on the gift, not the value of the gift.

Children and childcare3

Free childcare for working parents in England, and the income at which it is lost.

30 hours a week for 38 weeks, ages 9 months to 4 years — lost if either parent's adjusted net income is over £100,000

GOV.UK, Free Childcare for Working Parents · 2026 to 2027 tax year · checked again by 2027-03-01

England only. Scotland, Wales and Northern Ireland run different schemes with different rules.

The Tax-Free Childcare top-up, and the income at which it is lost.

£2 for every £8 paid in, up to £2,000 per child a year (£4,000 if disabled), to age 11 — lost if either parent's adjusted net income is over £100,000

GOV.UK, Tax-Free Childcare · 2026 to 2027 tax year · checked again by 2027-03-01

Cannot be held at the same time as Universal Credit or childcare vouchers. Runs UK-wide, unlike the free hours.

The income at which Child Benefit starts to be clawed back.

1% of Child Benefit for every £200 of adjusted net income over £60,000, and all of it at £80,000

GOV.UK, High Income Child Benefit Charge · From the 2024 to 2025 tax year · checked again by 2027-03-01

Student loans1

Annual income thresholds and deduction rates for student loan repayment.

Plan 1 £26,900, Plan 2 £29,385, Plan 4 £33,795, Plan 5 £25,000 — each at 9%; Postgraduate Loan £21,000 at 6%

GOV.UK, rates and thresholds for employers · 2026 to 2027 tax year · checked again by 2027-03-01

UK wealth data4

Median household total wealth in Great Britain, by age of household head.

£15,200 to £502,500 depending on age; £293,700 across all households

Office for National Statistics, Wealth and Assets Survey · April 2020 to March 2022, published 24 January 2025 · checked again by 2027-01-31

These are household figures by age of the household head, not individual figures, and ONS total wealth includes physical wealth such as vehicles and contents. They are stated in April 2020 to March 2022 prices, so they understate today's cash amounts.

Median household wealth excluding private pensions, in cash and in real terms, since 2006.

£146,600 to £181,700 in cash — but £195,200 to £181,700 in real terms

Office for National Statistics, Wealth and Assets Survey · July 2006 to June 2008, through to April 2020 to March 2022 · checked again by 2027-01-31

Real-terms figures are in April 2020 to March 2022 prices, adjusted using CPIH. Excludes private pension wealth, which is the largest single component for many households.

What household wealth in Great Britain is made of.

Net property 40%, private pensions 35%, net financial 14%, physical 10%

Office for National Statistics, Wealth and Assets Survey · April 2020 to March 2022 · checked again by 2027-01-31

Three quarters of it sits in two things that never appear in a bank account.

The gap between the wealthiest and least wealthy regions of Great Britain.

South East £489,800 against North East £179,900

Office for National Statistics, Wealth and Assets Survey · April 2020 to March 2022 · checked again by 2027-01-31

Median household total wealth, so it includes property and pensions.

Corrections

If a number here is wrong, we would rather know. Email hello@swealth.co.uk and say which page. Corrections to a published figure are made on the page itself with the date noted.

How Swealth makes money

The Swealth letter

We tell you when a figure moves

Thresholds change at the Budget and at the tax year end, usually without anyone telling the people they affect. One letter a week.