Three currencies, one lease: where the FX goes when rent, books and reporting all differ

The question this page answers

Most lease-accounting material treats foreign currency as one topic. It is two. A lease denominated in a currency that is not the entity's functional currency is a foreign-currency monetary item, and it is remeasured - through profit or loss. A subsidiary whose functional currency is not the group's presentation currency is translated - through other comprehensive income. Neither is optional, neither substitutes for the other, and a single contract can be subject to both at once.

That is exactly what happens here, and it is not exotic: a European subsidiary signing a sterling lease is an ordinary Tuesday. This page works the whole thing through - both foreign-currency processes, both ASC 842 classifications, every number tied out.

Fact pattern

There is no rent review, no option, no incentive and no modification. Everything on this page is caused by exchange rates alone.

Day 1 - measured in pounds, recorded in euros

The measurement happens in the transaction currency. Discount the 48 sterling payments at the sterling borrowing rate, then translate the result once, at the commencement spot rate. That translated figure becomes the euro carrying amount of the right-of-use asset - and it is the last time an exchange rate touches the asset.

The rate that matters is the one that never changes again

IAS 21.23 splits the balance sheet in two. The lease liability is monetary - it is a fixed obligation to deliver a fixed number of pounds - so it is restated at every closing rate for the rest of its life. The right-of-use asset is non-monetary and carried at historical cost, so it stays at 1.1274846944 until the day it is written off. ASC 830-10-45-17 reaches the same place. Every euro of volatility in this lease comes from that asymmetry: one side of the opening entry moves and the other does not.

The measurement, month by month

Three different rates do three different jobs, and using the wrong one is the most common error in this area. January 2023 shows all three.

Sterling strengthened against the euro during January, so the euro cost of a fixed sterling debt rose. That is a loss, and it is recognised immediately - there is no deferral and no OCI treatment available for it (IAS 21.28, ASC 830-20-35-1).

Two FX numbers, two destinations

Over the life of the lease, the same contract produces both of the following. They are not alternatives and they do not net against each other.

The number that hits earnings is the smaller one. The larger sits in equity, is recycled only on disposal of the subsidiary, and is invisible to anyone reading the income statement - which is precisely why it surprises people at year three.

The P&L column is the annual charge; the OCI column is the cumulative balance at each year end, which is why it moves in both directions and does not sum.

The journal entries

These are the entries the subledger actually posts in month 1, in the functional currency. The remeasurement is a two-line entry against the liability - the right-of-use asset is not in it.

Translation produces no entry in these books at all. It happens one level up, on consolidation, against balances that are already final in euros.

Now change the classification - and watch what does not move

Run the identical facts as an ASC 842 operating lease. The income statement changes shape completely: no interest line, no amortisation line, one single lease cost. In this model that cost is presented as two components on one account - the interest element at the monthly average rate, and the balancing amount at the historical rate, so that the asset still unwinds at the rate it was recognised at.

The foreign-exchange result is identical under both classifications - EUR 758,875.22 either way. Remeasurement attaches to the liability, and the liability is the same instrument whatever you call the lease. Classification changes the shape of the cost. It does not change the currency exposure by one cent.

What the lease actually cost

The total is worth sitting with, because it answers the question a CFO asks first.

Those last two lines are the same number, and that is the whole point. Over the life of the lease the euro cost is simply what the pounds actually cost in euros. The FX line is not an extra expense - it is the reconciling item between measuring once at commencement and paying forty-eight times at spot. It is a timing effect.

The GBP 23,040,000.00 of contractual rent, at the commencement rate, would have been EUR 25,977,247.36. The subsidiary paid EUR 26,840,134.39. The EUR 862,887.03 difference is what a strengthening pound cost it - split between the interest translated at prevailing rates and the remeasurement of the liability itself.

Proof

Every figure on this page comes out of a workbook that checks itself. These are the workbook's own tie-out cells, not commentary about them.

Three things to check before you apply this

Confirm the functional currency before anything else. Every number on this page turns on the subsidiary keeping its books in euros. If its functional currency were sterling there would be no remeasurement at all - the EUR 758,875.22 would simply not exist, and the entire exposure would sit in OCI instead. Functional currency is a judgement under IAS 21.9-14 / ASC 830-10-45-2, not a data-entry field, and it is the single most consequential input here.

Do not let the ROU asset drift onto a current rate. The most common error in foreign-currency lease accounting is remeasuring both sides of the opening entry. Systems that hold one blended rate per lease will do this silently, and the resulting figures still foot - a wrong answer that balances is the hardest kind to find.

Decide your rate convention and write it down. Payment-date spot, monthly average and closing rate each have a defensible job here, and IAS 21.22 permits an average where it approximates the actual rate. Different conventions give different interim numbers and the same lifetime total. Auditors ask which one you elected far more often than they challenge it.

Request the worked example

Two workbooks, in both ASC 842 classifications - the seven-tab reference model and the full validation model behind it.

The workbook is sent by email rather than downloaded, so tell me briefly what you are working on - the currencies, the term, and whether the entity's functional currency is settled. It usually means I can send something closer to your facts than the generic file. Write to bruceconwaycpa@aileasecontrollers.com.

This worked example uses an illustrative fact pattern prepared by Fractional AI Lease Controllers, Inc. Exchange rates are European Central Bank euro foreign exchange reference rates. It is published for technical reference and is not accounting advice. Applying it to your own facts depends on your functional-currency determination, your rate conventions and your existing policy elections.