Tax calculator

Capital Gains Tax Calculator

Estimate Capital Gains Tax on straightforward ordinary gains for 2026/27.

  • Tax year shown with the calculator
  • Assumptions explained
  • Source-linked methodology

2026/27 individual rates

Estimate Capital Gains Tax

For straightforward ordinary gains made by an individual in the 2026/27 tax year.

Before losses and the annual exempt amount, but after allowable acquisition, improvement and disposal costs.

Current-year allowable losses must be deducted even if this takes gains below the annual exempt amount.

The estimate uses only enough brought-forward loss to reduce remaining gains to the annual exempt amount.

Enter taxable income after the Personal Allowance and Income Tax reliefs—not salary, turnover or total income before allowances.

Is your £37,700 basic-rate band adjusted?

Gift Aid, relief-at-source pension contributions and certain other rules can extend or alter the band used for CGT.

Does a special or uncertain case apply?

Choose yes for BADR or Investors’ Relief, carried interest, a trust or company, non-UK residence, FIG or Overseas Workday Relief, Private Residence Relief, gifts, deferred gains, restricted losses, overseas assets or mixed tax-year disposals.

Your figures are used only for this calculation. They are not added to a lead record or analytics event.

What this calculator includes and excludes

It estimates 2026/27 CGT for an individual with ordinary gains, a standard £37,700 basic-rate band and the £3,000 annual exempt amount.

It does not work out whether a disposal is taxable, calculate the gain from sale proceeds and costs, determine relief eligibility, report a disposal or cover special residence, entity, asset or loss rules.

How to understand your result

The calculator content must explain the result breakdown, applicable period, rounding, assumptions, exclusions and the primary sources used by its versioned tax table.