FRS 102 Lease Calculator

Estimate the present value of lease payments, lease liability, right-of-use asset and monthly interest unwind for simple UK and Irish FRS 102 lease arrangements.

Important: This tool is intended for simple leases only. If your lease includes variable payments, lease modifications, extension or break options, embedded leases, subleases, purchase options, transition adjustments or unusual VAT/tax features, Accoura Advisors can help you find a suitable specialist to review the arrangement.

Enter lease details

Exclude refundable security deposits. These are normally separate financial assets.

Enter the annual effective interest rate implicit in the lease where readily determinable; otherwise use the selected incremental or obtainable borrowing rate for this lease.

Lease accounting estimate

Contractual payments-
Payment period discount rate-
Initial lease liability-
Illustrative ROU asset-
Total interest expense-
Calculation basis: The lease liability includes only payments unpaid at commencement. An advance regular payment due at commencement and any separate non-refundable commencement payment are added to the illustrative right-of-use asset instead. Amounts are shown in GBP (£).

Indicative journal entries

Interest unwind and liability schedule

Rows follow the contractual payment periods generated from the commencement date, lease end date, payment frequency and advance/arrears selection. A payment made at commencement is shown but excluded from the opening liability. The schedule is designed for review and planning, not as a substitute for detailed technical advice.

PeriodPayment dateOpening liabilityInterestPaymentClosing liabilityPV in liabilityTreatment

What next?

Move from the estimate to an implementation plan, or review another area affected by the FRS 102 periodic review.

How this calculator works

The tool converts the entered annual effective discount rate to an effective monthly rate, then discounts fixed contractual payment events generated from the commencement date, lease end date, payment frequency and timing. Payments made at or before commencement are excluded from the liability and added to the illustrative right-of-use asset. The tool does not automate incentives, initial direct costs, restoration obligations, options, variable payments, modifications or transition adjustments.

Methodology review completed 11 August 2026. Named technical reviewer and qualification can be added when supplied.



FRS 102 lease accounting frequently asked questions

Clear answers to common questions on FRS 102 lease accounting, lease liabilities, right-of-use assets and related tax or VAT points.

How should balloon payments or final lease payments be treated?

Known or contractual balloon payments should normally be included in the lease payments at commencement and discounted in the same way as other fixed payments. They increase the initial lease liability and right-of-use asset.

What if the balloon payment is linked to a purchase option?

If exercising the purchase option is reasonably certain, include the purchase price in the lease payments and depreciate the right-of-use asset over the asset’s useful life. If exercise is not reasonably certain, exclude the purchase price and depreciate over the lease term.

Do service elements such as maintenance, cleaning or insurance go into the lease liability?

Lease components are normally accounted for separately from non-lease components. If stand-alone prices are not readily observable, estimate them using as much observable information as possible. As a practical expedient, a lessee may elect by class of underlying asset not to separate associated non-lease components and instead account for them together as a single lease component.

How should initial direct costs and upfront payments be treated?

Initial direct costs that would not have been incurred if the lease had not been obtained are generally included in the right-of-use asset. Lease payments made at or before commencement also form part of that asset but are excluded from the lease liability. Refundable security deposits are generally separate financial assets.

Can a portfolio approach be used for similar leases?

Yes, a portfolio approach may be appropriate where leases have similar characteristics, such as term, asset class, risk profile and security. The outcome should not be materially different from assessing leases individually.

Are cars and vans eligible for the low-value exemption?

No. Cars and vans are generally not treated as low-value assets for this purpose.

How should vehicle lease components be split?

Common non-lease components include maintenance, tyres, roadside assistance, insurance, telematics and replacement vehicle services. They are normally separated using relative stand-alone prices, estimated with as much observable information as possible when prices are not readily observable, unless the lessee elects the paragraph 20.33 practical expedient by class of underlying asset.

How are road tax, registration, number plates and delivery fees treated?

Costs paid to or through the lessor that are directly attributable to preparing the asset for use may be included in the right-of-use asset. Recurring road tax or service-type costs are generally expensed as incurred where distinct.

How are mileage caps and excess mileage charges treated?

Excess mileage charges are usually variable payments based on usage and are expensed when incurred. They are not included in the initial lease liability unless they are in-substance fixed or represent unavoidable minimum payments.

How are damage charges, write-offs and insurance proceeds treated?

End-of-lease damage charges are usually expensed when incurred. If damage occurs earlier and an outflow becomes probable and measurable, a provision may be needed. For a write-off, derecognise the right-of-use asset, remeasure any remaining lease liability and account for insurance proceeds separately when sufficiently certain.

How should PCP-style GMFV or guaranteed future values be treated?

If the business is reasonably certain to purchase the asset, the guaranteed future value or purchase amount should be included in lease payments and depreciation should be over the useful life. If purchase is not reasonably certain, exclude it and depreciate over the lease term.

What happens if a vehicle lease is terminated early?

Termination penalties are included in the lease liability if the lease term reflects exercising the termination option. Otherwise, penalties are usually expensed when incurred and the right-of-use asset and lease liability are remeasured or derecognised as appropriate.

Do substitution rights or pool cars affect whether a lease exists?

Yes. If the lessor has substantive substitution rights and you do not control a specific identified asset, further assessment is needed to determine whether the arrangement is a lease or a service. Many fleet contracts identify specific vehicles, which often points towards a lease.

How are EV-related items such as batteries, charging and grants treated?

Battery-as-a-service and charging subscriptions are often non-lease service components, unless an identified asset is controlled by the lessee. Chargers owned by the business are usually PPE. Government grants are accounted for under grant guidance and do not reduce lease payments unless paid to or through the lessor.

What goes into the lease liability present value calculation?

The lease liability usually includes fixed payments, in-substance fixed payments, certain termination penalties and purchase option payments where exercise is reasonably certain. Variable payments based on usage are normally excluded unless they are in-substance fixed.

How is the right-of-use asset initially measured?

The right-of-use asset is generally measured as the lease liability, plus payments made at or before commencement, initial direct costs and restoration obligations, less lease incentives received.

Should the right-of-use asset be depreciated over the lease term or useful life?

If ownership transfers or purchase is reasonably certain, depreciate over the useful life. Otherwise, depreciate over the lease term. Straight-line depreciation is commonly used unless another systematic basis better reflects the consumption of benefits.

Which discount rate should be used?

Use the interest rate implicit in the lease if it is readily determinable. If it is not, choose on a lease-by-lease basis between the lessee’s incremental borrowing rate and the lessee’s obtainable borrowing rate. Enter the selected rate here as an annual effective rate.

What is an obtainable borrowing rate and how does it differ from an incremental borrowing rate?

FRS 102 permits either the lessee’s incremental borrowing rate or the lessee’s obtainable borrowing rate when the interest rate implicit in the lease is not readily determinable. The choice is made lease by lease; the selected rate should be supportable for that lease’s term, security and economic circumstances.

Can one discount rate be applied across all leases?

Usually not across dissimilar leases. Grouped rates may be appropriate where leases are homogeneous, for example by asset class, lease term and security. Outliers should be assessed separately.

What evidence should support the discount rate?

Useful evidence may include lender quotes, treasury pricing, date of quote, security, fees, covenants, conversion from nominal or APR rates to an effective annual rate and a documented sign-off trail.

How are foreign currency leases treated at commencement?

The monetary lease liability is translated at the spot rate at commencement. The right-of-use asset, being non-monetary, is initially translated at the same spot rate. The liability is then retranslated at each reporting date, with exchange differences recognised in profit or loss.

Does the accounting change alter corporation tax over the full term?

This calculator does not model tax. The timing and amount of tax deductions can differ from the depreciation and interest recognised in the accounts and should be reviewed under the applicable tax rules.

What is deductible for tax if the accounts show depreciation and interest?

For many lessees, the corporation tax computation may add back right-of-use depreciation and lease finance cost, then deduct allowable lease rentals under the relevant tax rules. Specific treatment depends on the asset, lease type and tax legislation.

Could lease finance costs affect Corporate Interest Restriction?

Yes. Lease finance costs may affect Corporate Interest Restriction calculations, interest cover and covenant metrics, depending on the facts and the wider group position.

How do rent-free periods and lease incentives work for tax and VAT?

For VAT, the treatment follows the underlying supply and invoice. Rent-free periods may mean no VAT-bearing consideration for that period. For tax, incentives may be spread differently from the accounting treatment, so the tax computation may need adjustments.

How is VAT treated in the lease calculation?

Recoverable VAT is normally excluded from lease cash flows. Irrecoverable VAT may require different treatment, so partially exempt businesses and unusual supplies should obtain VAT advice.

What about input VAT recovery on vehicle leases?

For UK cars, input VAT on leasing is commonly partly blocked where there is private use, while maintenance VAT may be recoverable if business-related. Commercial vehicles may have fuller recovery where used for taxable business activities. VAT advice should be obtained for specific facts.

How are deposits and guarantees treated for VAT and accounting?

Refundable deposits are usually outside the scope of VAT until applied or forfeited and are generally financial assets. Non-refundable amounts paid at inception may be consideration for the supply and may attract VAT. Lease cash flows should exclude recoverable VAT; irrecoverable VAT requires a fact-specific assessment.

When this calculator may not be enough

FRS 102 lease accounting can require judgement over lease term, discount rate, non-lease components, lease incentives, extension and termination options, impairment, rent-free incentives, modifications and transition. For detailed implementation, Accoura Advisors can introduce you to a suitable accounting specialist from our vetted network.

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