UK Cash Basis Property Income and the US Foreign Tax Credit

UK cash basis property income is the default measure of profit for most individual UK landlords: rent is taxed when received and costs are relieved when paid. A US return measures the same property on US rules. Where the two measures diverge, the foreign tax credit on Form 1116 stops lining up, and residual US tax appears.

Why the default matters more to a US-connected landlord than to anyone else

For a UK-only landlord, the choice between cash and accruals is a modest question of timing that evens out over the life of a letting. For a US person with a UK property it is not. It sets the measure of profit that generates the UK tax you will later try to credit, and it does so under rules that were written without any reference to how the Internal Revenue Code computes the same figure. At Jungle Tax we prepare both returns for the same client, and the single most common source of unexpected US tax on a UK letting is not a rate difference or a treaty question. It is that the two returns are measuring different numbers, in different years, for the same building.

UK cash basis property income has applied as the default for property businesses since 2017-18, and the point that is repeatedly missed is that it is a default, not an option. A landlord who has never thought about the question is already on it. HMRC's guidance at PIM1092 sets out the conditions, and unless one of them is failed, or an election out is made in time, the cash basis applies whether or not the accounts were prepared that way.

Who is inside the default, and who is outside it

The cash basis applies automatically to an individual or a partnership of individuals whose cash receipts from the property business for the tax year do not exceed £150,000. That threshold is applied to receipts, not profit, and it is reduced proportionately where the property business is carried on for only part of the year. Several categories sit outside the default entirely:

• Companies, limited liability partnerships and trustees, which must use the accruals basis in all cases.
• Partnerships that have a member which is not an individual — a single corporate partner takes the whole partnership out.
• Businesses with cash receipts above the £150,000 limit for the year.
• Businesses where a balancing adjustment would arise on business premises renovation allowance.
• Spouses and civil partners taxed on a deemed equal share of jointly held property, who must use the same basis as each other rather than choosing individually.

That last point catches mixed-nationality couples constantly. Where one spouse is a US person and the other is not, the US spouse cannot elect out unilaterally to suit a Form 1116 position; the basis follows the jointly assessed share, and the election has to be a joint decision about a UK return that only one of them has a US reason to care about.

The election out to accruals: what the deadline actually is

An election to compute property profits on the accruals basis instead must be made on or before the first anniversary of the normal self assessment filing date for the tax year concerned. For 2024-25, the filing date is 31 January 2026, so the election deadline is 31 January 2027. For 2025-26 it runs to 31 January 2028. The election is made for a tax year, so it is not a once-and-for-all switch: it can be made for one year and not the next, though the transitional adjustments described below make frequent switching expensive in preparation time.

The practical consequence is a genuine second bite. A 2024-25 UK return that has already been filed on the default cash basis can still be amended onto the accruals basis until 31 January 2027, and for a US-connected landlord that window is often the moment the mismatch is first spotted — typically when the 2025 Form 1040 is prepared in the following spring and the credit does not come out where it was expected. The two filing calendars mean the US return usually reveals the problem while the UK election is still open.

How does a US return measure the same rental profit?

A US individual reports foreign rental income on Schedule E of Form 1040, in US dollars, and almost always on the cash method. On the face of it that looks like a match for the UK cash basis, and for gross rent received it broadly is. The divergence comes from everything else on the schedule:

• Depreciation is compulsory, not optional. The building element of a foreign residential rental is depreciated under the Alternative Depreciation System on a straight-line basis over a recovery period which for foreign residential property placed in service after 2017 is 30 years, and for earlier property is generally 40 years. Land is not depreciable and must be stripped out of the purchase price. The UK gives no relief whatsoever for the cost of the building against rental profit — it sits in the capital gains base cost instead. This is a permanent, structural gap between the two profit figures that exists in every year of ownership.
• Repairs and improvements are drawn on different lines. The US tangible property rules capitalise expenditure that betters, restores or adapts the property, and depreciate it; the UK draws its own capital/revenue line, and under the cash basis capital expenditure on the property itself is still not deductible. The same invoice can be a full deduction on one return and a 30-year write-down on the other.
• Currency. The UK figure is in sterling for a 6 April to 5 April year. The US figure is in dollars for a calendar year, with the depreciation deduction fixed in dollars at the historic cost of acquisition and the rent translated at rates prevailing when received. The exchange movement alone can flip a US profit into a US loss without anything happening to the property.
• Loss rules. A Schedule E loss on a foreign rental runs into the passive activity loss rules, which generally suspend it rather than allowing it against other income. A UK property loss is carried forward against future UK property profits. Neither loss is available to the other jurisdiction.

UK cash basis and US Schedule E side by side

Item	UK — cash basis property business	US — Schedule E, Form 1040
Period measured	6 April to 5 April	1 January to 31 December
Currency	Sterling	US dollars, translated
Rent in arrear at year end	Not taxed until received	Not taxed until received (cash method)
Rent received in advance	Taxed when received	Taxed when received
Cost of the building	No relief against rental profit; capital gains base cost only	Depreciated, ADS straight line, land excluded
Improvement to the property	Not deductible; added to base cost	Capitalised and depreciated
Genuine repair	Deducted when paid	Deducted when paid, if it is not a betterment or restoration
Mortgage interest, residential let	Relieved as a basic rate tax reducer, not a deduction	Deducted in full against rental income on the schedule
Plant and machinery	Capital allowances generally unavailable under the cash basis; eligible items relieved when paid	Depreciated over its own recovery period
Losses	Carried forward against future UK property profits	Generally suspended under the passive activity rules

Read down that table and the conclusion is uncomfortable but useful: the two returns agree on the timing of cash rent and disagree on almost everything that follows it. The interest line alone can put the two profit figures a long way apart on a geared property, because a deduction on Schedule E is a tax reducer at 20% in the UK.

The years the two measures come apart

The year of a rent arrear

A tenant stops paying in January and the arrear is still outstanding on 5 April. Under the UK cash basis that rent is simply not income of the year — it is taxed if and when it is received. The US cash method reaches the same answer. The two returns agree, and the credit works.

Now elect out to accruals. The UK return brings the arrear into 2024-25 profit, and UK tax is paid on rent that was never received. The US return still ignores it. UK tax has gone up on a UK profit figure that has no corresponding US income, so the Form 1116 numerator does not move while the tax paid does. The excess credit is stranded in the passive category. When the arrear is finally recovered in a later year, the position reverses: the US taxes the receipt, the UK does not tax it again, and now there is US income with no UK tax against it. Two mismatched years replace one aligned one. This is the clearest single case where the accruals election is actively harmful to a US-connected landlord.

The year of a large repair

A £45,000 roof repair invoiced in March 2026 and paid in June 2026 illustrates the second trap. On the UK cash basis it is a 2026-27 deduction, because that is when it was paid; on the US cash method it is a calendar 2026 deduction. Those two years overlap for the bulk of the UK year, and the credit broadly works. Elect out to accruals and the UK deducts it in 2025-26, the year of the invoice, while the US still deducts it in calendar 2026. The UK profit for 2025-26 falls, so the UK tax available to credit falls, in a US year in which the US profit has not yet fallen. The following year the mirror image arises.

The separate and harder question is whether the expenditure is a repair at all. If the works go beyond restoring the property and amount to a betterment, the US position is capitalisation and a 30-year write-down while the UK position may still deny relief entirely. That is not a timing difference to be managed, it is a permanent difference that has to be tracked, and it is the reason a US-connected landlord should keep a separate US fixed asset register from the first day of ownership rather than reconstructing one later.

The year of a mid-year purchase

A property acquired in, say, October brings three separate part-year problems together. The £150,000 cash receipts threshold is reduced proportionately for the part of the year the business is carried on, so a substantial portfolio can fail the test in its first part-year when it would pass in a full one. Stamp duty land tax, legal fees and survey costs get no UK rental deduction at all, but a proportion of them is allocated to the building on the US side and enters the depreciable basis. And the US depreciation deduction for the first year is itself part-year, computed from the month the property is placed in service.

The result is a first year in which the UK profit is high — no relief for acquisition costs, no relief for the building — and the US profit is materially lower. High UK tax, low US foreign source income, and a Form 1116 limitation that cannot absorb the credit. The first year of a UK property is very often the year that creates a carryover the landlord never uses.

What does the mismatch do to Form 1116?

Form 1116 does not credit UK tax against UK profit. It limits the credit to the US tax attributable to foreign source taxable income, and that income is computed entirely under US rules. The UK measure of profit never enters the numerator; it only determines how much UK tax was paid. So the fraction that governs the credit has a US-computed numerator and a UK-determined tax figure sitting above it, and any divergence between the two profit measures shows up directly as either an unusable excess credit or unrelieved US tax. The IRS overview of the foreign tax credit and the detail in Publication 514 set out the limitation mechanics.

Paid or accrued, and why UK payment dates make it worse

A US cash method taxpayer credits foreign tax in the year it is paid. UK self assessment does not pay tax in one lump in the year the profit arises: it collects payments on account on 31 January within the tax year and 31 July after it, with a balancing payment the following 31 January. Tax on a single UK tax year's property profit therefore lands across as many as three US calendar years. On the paid method, one US year receives two instalments and another receives none, which produces excess credits and excess limitation in alternate years for no economic reason at all.

An election under section 905(a) to credit foreign taxes on the accrued basis relates the tax back to the year the income was earned and largely cures this. It is a significant step: once made it is binding for all later years, and it requires the UK tax year's liability to be apportioned to the US calendar years it straddles. It is frequently the right answer for a landlord whose UK tax profile is stable, and the wrong one for someone whose UK liability is volatile or who is about to leave the UK. Either way it is a decision to be taken deliberately and documented, not discovered years later from the way a previous preparer completed the form.

Categories, carryback and carryforward

Rental income is generally passive category income for Form 1116 purposes, and each category has its own form and its own limitation. A general category carryover generated by UK employment earnings cannot be used against US tax on rental profit. Unused passive credits carry back one year and forward ten, and a landlord whose US profit is permanently depressed by ADS depreciation while UK tax is charged on an undepreciated profit will generate passive credits year after year with no capacity ever to use them. Those credits expire. It is worth checking the Form 1116 instructions for the current year's category definitions and the high-taxed income rules, which can move rental income between categories in some fact patterns.

What the election out to accruals actually buys a US-connected landlord

Very little, in most cases — and that is the finding that surprises clients. The cash basis is the closer match to the US cash method for the items on which the two systems could agree. Electing out introduces divergence rather than removing it. There are, however, genuine reasons to elect out, and they are worth stating precisely:

• Capital allowances. Under the accruals basis a landlord can claim capital allowances on qualifying plant and machinery, which is not generally available on the cash basis outside cars. Where a commercial property or a portfolio with substantial plant is involved, that can outweigh everything else.
• The receipts threshold. A business that will exceed £150,000 in the near future may prefer to move to accruals in a controlled year rather than be forced across the line with an involuntary transitional adjustment.
• Financing and reporting. Lenders, funds and co-investors frequently require accruals accounts, and running two sets of numbers for the same portfolio is its own risk.
• The cash basis interest restriction. Where borrowings exceed the value of the property business's properties, the cash basis restricts the interest deduction in a way the accruals basis does not.

What the election does not buy is a better foreign tax credit. If the motivation offered for electing out is that it will "match the US return", the analysis has gone wrong somewhere, because on the timing items that actually match, it does the opposite.

When is electing out the wrong call?

The election is generally the wrong call where the portfolio is residential and lightly plant-intensive, where arrears are a live feature of the tenancies, where the landlord is close to leaving or entering UK residence, or where the property business is small enough that the accruals adjustments cost more in preparation than they save in tax. It is also the wrong call in the year of entry to or exit from the cash basis if the transitional adjustments have not been quantified first.

Those adjustments, set out at PIM1096, exist to make sure nothing is counted twice or missed. Income earned but not received under the old basis is deducted from the first cash basis year's profit; expenses incurred but unpaid are added back; prepaid expenses and rent received in advance are brought fully into account. Each of those adjustments is a UK-only event with no US counterpart at all, so a switch year is by definition a year in which the two returns cannot agree. Where a switch is unavoidable, the right approach is to model the US consequence before the UK election is made, not after.

Two further 2026 mechanics that change the picture

First, the non-resident landlord position. A US-resident owner of a UK property is within the non-resident landlord scheme, and unless HMRC has approved receipt of rent gross, the letting agent or tenant deducts basic rate tax from the rent. That deduction is a UK tax payment in the year it is made, which for a US filer on the paid method is a different year from the one in which the self assessment liability is finally computed. Obtaining approval to receive rent gross removes a timing problem as well as a cash flow one.

Second, Making Tax Digital for Income Tax begins to apply to landlords from April 2026 by reference to qualifying income, with the threshold stepping down over the following two years. Quarterly updates are prepared from digital records, and for a landlord on the default cash basis those updates are cash figures. In practice this makes the underlying records better suited to a US return than most landlords' historic records ever were — provided the property is set up with a US fixed asset register and a dollar-translation convention from the outset. Our US tax services and UK tax services teams set both up together for exactly this reason.

A working method for the two returns

• Establish, in writing, which basis the UK return is on and whether that was a choice or the default. Most landlords do not know.
• Build a US fixed asset register at acquisition: purchase price split between land and building, acquisition costs allocated, placed-in-service date, ADS recovery period, dollar basis at the historic rate.
• Keep a permanent-difference schedule separate from a timing-difference schedule. Depreciation and the interest tax reducer are permanent; arrears and payment dates are timing.
• Reconcile the UK tax year profit to the US calendar year profit every year, and record why they differ. That reconciliation is the working paper that supports the Form 1116 numerator if it is ever examined.
• Decide the section 905(a) accrual question once, deliberately, with the reasoning documented.
• Review the election out deadline annually — for 2024-25, 31 January 2027 — as a standing diary item, because it is the only point at which the UK measure can still be changed.

Where returns have not been filed at all, the analysis above is still the analysis, but it has to be done for several years at once and it interacts with the disclosure route chosen. Landlords who have held a UK property through a period of US non-filing should read our guidance on IRS streamlined filing before amending anything, and our wider cross-border guides for the surrounding reporting obligations. Where a UK property sits alongside pensions, trusts or investment accounts, our high net worth team looks at the return as a whole rather than schedule by schedule.

Speak to us before the election window closes

The 31 January 2027 deadline for 2024-25 is a real and recoverable opportunity, but it is only useful if the US consequence has been modelled first. If you own UK property and file a US return — or should be filing one — we will reconcile the two measures of your rental profit, quantify the Form 1116 position on both the paid and accrued methods, and tell you plainly whether the election out is worth making in your case. To review your position in confidence, contact our cross-border team for a private consultation.