United Kingdom version
How it works
Compare equal ownership periods while accounting for the outstanding purchase loan and the lease distance allowance.
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
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?unitSystem=Measurement systemChoice · Optional · Default: metric · Accepted values: imperial, metric
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?months=Comparison horizon, monthsNumber · Required · Default: 36
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?buyPrice=Purchase price including purchase taxes/feesMoney · Required · Default: 30,000
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?buyDownPayment=Purchase down paymentMoney · Required · Default: 5,000
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?loanRate=Purchase loan annual nominal ratePercentage · Required · Default: 6
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?loanMonths=Purchase loan term, monthsNumber · Required · Default: 60
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?resale=Expected sale proceeds at comparison horizonMoney · Required · Default: 20,000
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?leaseUpfront=Nonrefundable lease cash at signingMoney · Required · Default: 2,000
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?leaseMonthly=Monthly lease payment including stated taxesMoney · Required · Default: 400
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?leaseEndFees=Expected lease-end/disposition/condition feesMoney · Required · Default: 500
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?distance=Total distance driven during comparisonNumber · Required · Default: 45,000
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?leaseAllowance=Total permitted lease distance during comparisonNumber · Required · Default: 36,000
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?excessRate=Lease excess-distance charge per distance unitMoney · Required · Default: 0.15
Outputs
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loanPaymentPurchase loan monthly paymentCurrency · Currency: GBP
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remainingLoanPurchase loan balance at horizonCurrency · Currency: GBP
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buyCostPurchase cash paid plus loan balance minus sale proceedsCurrency · Currency: GBP
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leaseCostEntered lease cash and excess-distance costCurrency · Currency: GBP
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leaseMinusBuyLease cost minus purchase costCurrency · Primary output · Currency: GBP
Formula
purchase cost at exit = down payment + loan payments made + remaining loan − sale proceeds.
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
- Comparison horizon, months: Enter the quantity described by the label.
- Purchase price including purchase taxes/fees: Enter the quantity described by the label.
- Purchase down payment: Enter the quantity described by the label.
- Purchase loan annual nominal rate: Enter the quantity described by the label.
- Purchase loan term, months: Enter the quantity described by the label.
- Expected sale proceeds at comparison horizon: Enter the quantity described by the label.
- Nonrefundable lease cash at signing: Enter the quantity described by the label.
- Monthly lease payment including stated taxes: Enter the quantity described by the label.
- Expected lease-end/disposition/condition fees: Enter the quantity described by the label.
- Total distance driven during comparison: Enter the quantity described by the label. The measurement selector converts this physical quantity; it does not change the underlying scenario.
- Total permitted lease distance during comparison: Enter the quantity described by the label. The measurement selector converts this physical quantity; it does not change the underlying scenario.
- Lease excess-distance charge per distance unit: Enter the quantity described by the label. This is a price per displayed unit, so the price converts inversely to the physical quantity.
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.
| Input | Example value |
|---|---|
| Comparison horizon, months | 36 |
| Purchase price including purchase taxes/fees | 30,000 |
| Purchase down payment | 5,000 |
| Purchase loan annual nominal rate | 6 |
| Purchase loan term, months | 60 |
| Expected sale proceeds at comparison horizon | 20,000 |
| Nonrefundable lease cash at signing | 2,000 |
| Monthly lease payment including stated taxes | 400 |
| Expected lease-end/disposition/condition fees | 500 |
| Total distance driven during comparison (km) | 45,000 |
| Total permitted lease distance during comparison (km) | 36,000 |
| Lease excess-distance charge per distance unit (/km) | 0.15 |
| Output | Calculated result |
|---|---|
| Purchase loan monthly payment | GBP 483.32 |
| Purchase loan balance at horizon | GBP 10,905.0854 |
| Purchase cash paid plus loan balance minus sale proceeds | GBP 13,304.6067 |
| Entered lease cash and excess-distance cost | GBP 18,250 |
| Lease cost minus purchase cost | GBP 4,945.3933 |
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
- Prices, consumption and contract terms are entered scenarios. This is not a retail quote, tax eligibility determination or vehicle safety certification.
- Use the actual scheduled lease term or an explicit early-exit quote; this does not invent a termination right. Refundable deposits, maintenance differences, opportunity cost and tax deductibility require separate treatment.
Frequently asked questions
What does this Vehicle Lease Versus Buy result represent?
Compare equal ownership periods while accounting for the outstanding purchase loan and the lease distance allowance. 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?
Prices, consumption and contract terms are entered scenarios. This is not a retail quote, tax eligibility determination or vehicle safety certification.
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
- DOE energy-use arithmetic — retrieved 2026-09-24. Energy consumption versus power; not a local tariff or an approval of this implementation.
- NIST unit conversion guidance — retrieved 2026-09-24. Unit definitions; geometry and financial arithmetic in these worksheets are explicitly stated.
- CFPB loan-estimate explanation — retrieved 2026-09-24. US cost components; the general amortization formula is stated separately.
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.