U
UK Tax Tools

Net Worth Calculator

Track total assets and debts across ISA, SIPP, GIA, home equity, and more. Get personalised UK tax-optimisation tips covering ISA allowance, pension AA, LISA eligibility, and HICBC.

Net Worth

£150,000

Total Assets

£425,000

Total Liabilities

£275,000

Debt / Asset

65%

Liquidity Ratio

7% liquid

Tax-Advantaged % of investments

91%

Assets
Liabilities
Your Situation
Asset Allocation
Cash & savings£5,000 · 1%
ISA£20,000 · 5%
SIPP / Pension£30,000 · 7%
GIA (brokerage)£5,000 · 1%
Primary home£350,000 · 82%
Vehicles£15,000 · 4%
Tax Optimization Tips
  • Pension Annual Allowance remaining: £60,000. SIPP contributions receive tax relief at your marginal rate.

    Pension tax relief

    Est. value: ~£2,400/yr

  • Aged 18-39: Lifetime ISA offers £1,000/year government bonus on up to £4,000/year contributions, usable for a first home or retirement (age 60+).

    Est. value: ~£1,000/yr

  • You have £20,000 of ISA allowance left this tax year. ISA resets 6 April — use it or lose it.

    ISA tools

    Est. value: ~£200/yr

Frequently asked questions

What counts as net worth in the UK?

Net worth = assets (cash, ISA, SIPP, GIA, home, property, vehicles) minus liabilities (mortgage, student loan, credit cards).

Should I include my primary home?

Yes — market value as asset, mortgage as liability. Homes are illiquid (agent+legal fees 1.5-3%) so the liquidity ratio separates liquid holdings.

What's a good tax-advantaged % by age?

Under 30: aim for 70%+ (ISA + SIPP). 30-44: 60-70%. 45-59: 50-60%. 60+: drawdown strategy matters more than %. ISA and SIPP are the two main UK tax wrappers.

How do I improve my tax-advantaged %?

Use the £20,000 ISA allowance every tax year (resets 6 April). Contribute to a SIPP for tax relief at your marginal rate (20%, 40%, or 45%). For ages 18-39, open a LISA for a 25% bonus up to £1,000/year.

What UK account types are tax-advantaged?

ISA (tax-free growth, tax-free withdrawals). SIPP/Pension (tax relief going in, 25% tax-free lump sum at 55-57). LISA (age 18-39, £4,000 cap, 25% bonus, first home or retirement). Premium Bonds (tax-free prizes).

Last updated 18 April 2026Tax year 2025-26

Data sources: HMRC (gov.uk/hmrc)

This tool is general information only, not financial advice.

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