Free FRS 102 Lease Liability Calculator
Calculate lease liability and right-of-use asset under FRS 102 Section 20 (revised). The new UK standard effective January 2026 requires all leases on the balance sheet — enter your lease terms below for instant results.
Calculate your FRS 102 Section 20 lease liability and right-of-use asset in under 2 minutes. Enter your lease terms, payment amounts, and obtainable borrowing rate — get instant present value calculations with a full amortisation schedule.
Lease Parameters
FRS 102 Results
Lease Liability
£529,907.06
Right-of-Use Asset
£529,907.06
Total Interest
£70,092.94
Total Payments
£600,000.00
Initial Recognition Journal Entry
Dr. Right-of-Use Asset — £529,907.06
Cr. Lease Liability — £529,907.06
What Changed in FRS 102 Section 20
The revised FRS 102 Section 20, effective for accounting periods beginning on or after 1 January 2026, fundamentally changes how UK entities account for leases. Previously, lessees classified leases as either operating or finance leases. Under the revised standard, nearly all leases must be recognised on the balance sheet as a right-of-use (ROU) asset and a corresponding lease liability — aligning UK GAAP with the international IFRS 16 standard. This affects approximately 3.4 million UK businesses.
How FRS 102 Lease Liability Is Calculated
Under the revised FRS 102 Section 20, the lease liability equals the present value of future lease payments discounted at the lessee's incremental borrowing rate (IBR). The right-of-use (ROU) asset is initially measured at the lease liability amount, plus initial direct costs and prepayments, less any lease incentives received from the lessor. This is the same present value methodology used under IFRS 16.
FRS 102 vs IFRS 16: Key Differences
While FRS 102 Section 20 (revised) and IFRS 16 both require on-balance-sheet lease recognition, there are notable differences in scope, exemptions, and disclosure requirements:
| Aspect | FRS 102 | IFRS 16 |
|---|---|---|
| Scope | UK entities reporting under UK GAAP | Entities reporting under IFRS (international) |
| Effective Date | 1 January 2026 | 1 January 2019 |
| Initial Measurement | PV of lease payments (same formula) | PV of lease payments (same formula) |
| Short-term Exemption | Leases ≤ 12 months at commencement | Leases ≤ 12 months + low-value assets |
| Typical Currency | GBP (£) | EUR (€) and other currencies |
Present Value Formula
For fixed lease payments in arrears, the lease liability under FRS 102 is calculated using the ordinary annuity present value formula:
Where PMT = monthly payment, r = monthly discount rate, n = number of months
Worked Example: £10,000/Month Office Lease
A UK company enters a 5-year office lease at £10,000 per month, paid in arrears. The obtainable borrowing rate (OBR) is 5% per annum. Initial direct costs are £3,000, and the landlord provides a £12,000 lease incentive.
Step 1: Determine the Monthly Discount Rate
Annual rate 5% ÷ 12 months = 0.4167% per month (0.004167 as a decimal).
Step 2: Calculate the Present Value of Lease Payments
Using the ordinary annuity formula: PV = £10,000 × [(1 − (1.004167)⁻⁶⁰) / 0.004167] = £530,659. This is the lease liability at commencement.
Step 3: Determine the Right-of-Use Asset
ROU Asset = £530,659 (lease liability) + £3,000 (direct costs) − £12,000 (incentive) = £521,659.
Step 4: Monthly Amortisation (First 3 Months)
| Month | Opening | Interest | Principal | Closing |
|---|---|---|---|---|
| 1 | £530,659 | £2,211 | £7,789 | £522,870 |
| 2 | £522,870 | £2,179 | £7,821 | £515,049 |
| 3 | £515,049 | £2,146 | £7,854 | £507,195 |
Interest is front-loaded: early payments are mostly interest, while later payments are mostly principal reduction.
Expert Tips for FRS 102 Lease Calculations
Determining the OBR
Start with your most recent bank borrowing rate for a loan of similar amount and term. If no recent borrowing exists, request an indicative quote from your bank. The Bank of England base rate plus a credit spread of 1–4% (depending on entity size and creditworthiness) provides a reasonable estimate for most SMEs.
Short-Term Lease Exemption
Leases with a remaining term of 12 months or less at commencement can be exempted from on-balance-sheet recognition. However, this exemption applies lease-by-lease — you cannot selectively exempt some short-term leases while capitalising others of the same class.
Transition Approach
Use the modified retrospective approach: measure the lease liability at the present value of remaining payments at transition date, and set the ROU asset equal to the lease liability (adjusted for prepaid or accrued amounts). No restatement of comparative periods is required.
Break Clause Assessment
For leases with break clauses, carefully assess whether the lessee is 'reasonably certain' not to exercise the break. Consider leasehold improvements, relocation costs, business dependency on the location, and historical exercise patterns. The assessment directly determines the lease term used in the calculation.
Frequently Asked Questions
How do I calculate lease liability under FRS 102?
Under FRS 102 Section 20 (revised), lease liability equals the present value of future lease payments, discounted at the obtainable borrowing rate (OBR). Use the ordinary annuity formula for payments in arrears, or the annuity-due formula for payments in advance. Our free calculator above performs this calculation automatically.
What is the obtainable borrowing rate (OBR)?
The OBR is FRS 102's equivalent of a discount rate — defined as the rate at which the entity could borrow an amount similar to the total undiscounted lease payments, over a similar term, with similar security. It is generally simpler to determine than the IFRS 16 incremental borrowing rate (IBR).
Do I need to capitalise all leases under FRS 102?
Nearly all leases must be recognised on the balance sheet. Two exemptions exist: short-term leases (12 months or less remaining at commencement) and low-value assets. Unlike IFRS 16, FRS 102 does not specify a monetary threshold for low-value assets — entities apply judgement.
How does FRS 102 handle rent-free periods?
Rent-free periods are included in the lease term. The lease liability is calculated based on the full contractual payments over the entire lease term. During the rent-free period, no payment reduces the liability — only interest accrues. The ROU asset is depreciated from commencement, including the rent-free period.
When does the new FRS 102 lease standard take effect?
The revised Section 20 takes effect for accounting periods beginning on or after 1 January 2026. Early adoption is permitted for periods beginning on or after 1 January 2025, provided the entity applies all Periodic Review 2024 amendments simultaneously.
How do break clauses affect the FRS 102 lease calculation?
Break clauses directly affect the lease term used in the calculation. If the lessee is 'reasonably certain' not to exercise a break option, the full lease term is used. If the lessee is reasonably certain to exercise the break, only the period up to the break date is used. The assessment should consider leasehold improvements, relocation costs, and business dependency.
Is this calculator suitable for FRS 102 compliance?
This calculator provides indicative results for educational and planning purposes. It correctly implements the present value formula used in FRS 102 for fixed lease payments. For actual compliance, the calculation should be reviewed by a qualified accountant who can assess lease-specific factors such as variable payments, modifications, and appropriate discount rates.
What is the difference between FRS 102 and IFRS 16 lease calculations?
The present value calculation formula is identical. The key differences are: FRS 102 uses the obtainable borrowing rate (OBR) while IFRS 16 uses the incremental borrowing rate (IBR), FRS 102 has simplified disclosure requirements, and FRS 102 applies to UK GAAP reporters while IFRS 16 applies to entities reporting under international standards.
FRS 102 Lease Accounting Guides
Explore our comprehensive guides to FRS 102 lease accounting:
FRS 102 Lease Liability Guide
Step-by-step PV calculation, amortisation schedule, and remeasurement triggers
FRS 102 Right-of-Use Asset Guide
Initial measurement, depreciation methods, and impairment testing
FRS 102 Discount Rate Guide
How to determine the obtainable borrowing rate (OBR) for UK businesses
FRS 102 Property Lease Guide
Rent-free periods, break clauses, dilapidations, and service charges
Reporting under IFRS instead of UK GAAP? Use our IFRS 16 Lease Liability Calculator →
Disclaimer
This calculator provides indicative results for educational purposes only. It assumes fixed lease payments with no variable components, modifications, or reassessments. For actual FRS 102 compliance, consult a qualified accountant. LeaseIQ automates lease calculations as part of its lease extraction platform.