United Kingdom version
How it works
Separate gain, taxable inclusion and tax rate. This explicit-rate scenario is not an automatic preferential-rate, stacking, indexation or recapture calculation.
This is the United Kingdom planning view, with monetary inputs and outputs in GBP. A currency label does not establish that a tax rate, construction price, coverage rule or legal limit has been verified locally. The inputs and limitations below describe the actual scope.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
8-
?proceeds=Sale proceedsMoney · Required · Default: 50,000
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?basis=Adjusted acquisition basisMoney · Required · Default: 30,000
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?sellingCosts=Eligible selling expensesMoney · Required · Default: 1,000
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?losses=Eligible losses availableMoney · Required · Default: 0
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?allowance=Eligible annual exemptionMoney · Required · Default: 0
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?inclusion=Taxable inclusion percentPercentage · Required · Default: 100
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?taxRate=Verified applicable rate for this gainPercentage · Required · Default: 0
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?rulesConfirmed=Basis, losses, allowance, inclusion and rate verifiedTrue or false · Optional · Default: false
Outputs
4-
gainGain before losses/exemptionCurrency · Currency: GBP
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taxableTaxable amount in entered scenarioCurrency · Currency: GBP
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taxModeled taxCurrency · Primary output · Currency: GBP
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afterTaxProceeds less selling costs and modeled taxCurrency · Currency: GBP
Formula
Gain = proceeds − adjusted basis − selling expenses. Tax = max(0, gain − losses − exemption) × inclusion × entered rate.
Calculations retain numeric precision internally. Displayed values are rounded for readability. Quantities that must be purchased as whole units are rounded up only where the formula explicitly requires it.
Read the inputs before calculating
- Sale proceeds: Enter the quantity described by the label.
- Adjusted acquisition basis: Enter the quantity described by the label.
- Eligible selling expenses: Enter the quantity described by the label.
- Eligible losses available: Enter the quantity described by the label.
- Eligible annual exemption: Enter the quantity described by the label.
- Taxable inclusion percent: Enter the quantity described by the label.
- Verified applicable rate for this gain: Enter the quantity described by the label.
- Basis, losses, allowance, inclusion and rate verified: Enter the quantity described by the label. Leave this unconfirmed until you have actually checked the required condition.
Reproducible worked example
The following is a fictional arithmetic example, not a local quote, a verified claimant or a market forecast. Its values are included so the formula can be checked. The form does not automatically confirm any verification checkbox.
Basis, losses, allowance, inclusion and rate verified: assumed confirmed solely for this fictional demonstration
| Input | Example value |
|---|---|
| Sale proceeds | 50,000 |
| Adjusted acquisition basis | 30,000 |
| Eligible selling expenses | 1,000 |
| Eligible losses available | 0 |
| Eligible annual exemption | 0 |
| Taxable inclusion percent | 100 |
| Verified applicable rate for this gain | 0 |
| Basis, losses, allowance, inclusion and rate verified | true |
| Output | Calculated result |
|---|---|
| Gain before losses/exemption | GBP 19,000 |
| Taxable amount in entered scenario | GBP 19,000 |
| Modeled tax | GBP 0 |
| Proceeds less selling costs and modeled tax | GBP 49,000 |
Interpreting a changed assumption
Start with one complete scenario and change only one input when diagnosing a difference. Recheck units, the period of every rate, whether an amount is recurring or one-off, and whether a cost is already included elsewhere. A larger calculated benefit is not evidence that an assumption is more likely to occur.
Limitations
- Planning calculation, not a tax return, benefit decision, credit approval or legal opinion. No eligibility is inferred from a numeric result.
- Only the stated tax year and expressly supported rule components are included. Entered amounts require independent verification.
- No loss refund is assumed. The source of losses and legal order of relief can change the actual taxable gain.
Frequently asked questions
What does this Capital Gains Tax Scenario result represent?
Separate gain, taxable inclusion and tax rate. This explicit-rate scenario is not an automatic preferential-rate, stacking, indexation or recapture calculation. It applies the displayed formula to your inputs; it does not infer omitted facts.
Are the starting amounts verified United Kingdom prices or legal rules?
No. Numeric defaults are illustrative unless an input or dated reference explicitly identifies a researched component. Currency is GBP; local quotes, eligibility and unsupported rules must be entered and verified separately.
What must I check before relying on the result?
Planning calculation, not a tax return, benefit decision, credit approval or legal opinion. No eligibility is inferred from a numeric result. Only the stated tax year and expressly supported rule components are included. Entered amounts require independent verification.
Can I compare or share different assumptions?
Change one assumption at a time and use the browser-local project or share controls. A shared URL contains the encoded input values; do not include information you do not wish to disclose.
Sources and reference scope
- UK income authority — retrieved 2026-09-24. Use only the expressly supported schedule components; this link does not validate unrelated taxes.
These references support only their stated scope. They are not evidence that every local rule or price needed by the master expansion has been loaded.