About the Lease Accounting Calculator (ASC 842 / IFRS 16)
This lease accounting calculator measures a lessee’s lease at commencement and builds the schedule that follows. It discounts the fixed lease payments at your discount rate to get the lease liability, adds payments made at commencement and initial direct costs and deducts lease incentives to get the right-of-use (ROU) asset, then rolls both balances forward year by year with interest and amortization.
It is meant for accountants, controllers and auditors implementing US GAAP ASC 842 or IFRS 16, and for business owners who want to understand how a new office, vehicle or equipment lease will show up on the balance sheet and income statement. Choose “Finance lease / IFRS 16” for front-loaded interest plus straight-line ROU amortization, or “Operating lease (ASC 842)” for a single straight-line lease cost.
Assumptions: payments are fixed (with an optional annual escalation), the discount rate is the rate implicit in the lease or your incremental borrowing rate converted to a periodic rate by dividing by payments per year, there are no variable payments, residual value guarantees or purchase options, and the ROU asset is amortized over the lease term. Payments due on the commencement date are excluded from the liability and added to the ROU asset.
With the default inputs, the lease liability at commencement is $258,627.80. Change any value above to recalculate instantly.
How to use the lease accounting calculator (asc 842 / ifrs 16)
- 1Enter the fixed lease payment, how often it is paid and the lease term in months.
- 2Enter the rate implicit in the lease or your incremental borrowing rate.
- 3Choose whether payments are made at the start or end of each period and any annual escalation.
- 4Add initial direct costs and lease incentives received, if any.
- 5Pick the classification, then read the liability, ROU asset and yearly schedule.
Formula and method
The lease liability is the present value of the lease payments not yet paid at commencement, discounted at the periodic rate r (annual rate ÷ payments per year). With payments in advance, the first payment is made on day one, so it is left out of the liability and added to the ROU asset instead. Each period the liability accrues interest at r and is reduced by the payment, reaching zero at the end of the term.
Under a finance lease (and under IFRS 16 for all lessee leases), the ROU asset is amortized straight-line and interest is recognised separately, so total expense is highest early on. Under an ASC 842 operating lease, a single straight-line lease cost is recognised; the ROU amortization each period is the plug equal to that cost minus the interest accretion, so both balances end at zero together. The current portion is the principal reduction in the next 12 months.
- Pₜ
- Lease payment due at period t
- r
- Periodic discount rate (annual rate ÷ payments per year)
- n
- Number of payment periods in the lease term
- IDC
- Initial direct costs
Worked examples
5-year office lease, operating (ASC 842)
Sixty $5,000 monthly payments discounted at 0.5% a month give a lease liability and ROU asset of $258,627.80. Total interest over the term is $41,372. As an operating lease, year-1 expense is a straight-line $60,000, of which $14,274 is interest accretion and $45,726 is ROU amortization.
10-year equipment lease, annual in advance, finance
The first $100,000 payment is made at commencement, so the liability is the present value of the remaining nine escalating payments: $818,497.60. Adding that first payment and $10,000 of direct costs gives a $928,497.60 ROU asset, amortized at $92,850 a year. Year-1 interest of $40,925 brings total expense to $133,775.
Quarterly vehicle lease with an incentive
Twelve quarterly payments of $15,000 discounted at 2% per quarter give a $158,630 liability. The ROU asset is $158,630 + $2,000 − $5,000 = $155,630. Straight-line cost is ($180,000 + $2,000 − $5,000) ÷ 12 = $14,750 a quarter, or $59,000 a year.
Frequently asked questions
What discount rate should I use under ASC 842 and IFRS 16?+
Use the rate implicit in the lease if it can be readily determined; otherwise use your incremental borrowing rate — what you would pay to borrow a similar amount over a similar term with similar security. Private companies under ASC 842 may elect a risk-free rate by asset class.
What is the difference between an operating and a finance lease under ASC 842?+
Both put a liability and an ROU asset on the balance sheet. A finance lease shows interest and amortization separately, front-loading expense; an operating lease shows one straight-line lease cost in operating expenses.
Does IFRS 16 have operating leases for lessees?+
No. IFRS 16 uses a single lessee model in which almost all leases are accounted for like finance leases, with interest and depreciation. Optional exemptions exist for short-term leases of 12 months or less and leases of low-value assets.
Why is the first payment excluded from the lease liability when paid in advance?+
The liability measures payments not yet made. A payment made at or before commencement has already been settled in cash, so it is added to the right-of-use asset rather than the liability.
How are lease incentives and initial direct costs treated?+
Initial direct costs, such as commissions paid to obtain the lease, are added to the ROU asset. Incentives received from the lessor, such as cash toward fit-out, reduce the ROU asset.
How do I split the lease liability into current and non-current?+
The current portion is the amount by which the liability will fall over the next 12 months — the principal part of the payments due in that period. The remainder is non-current.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.