UK-Italy Double Tax Treaty for STR Rental Income 2026 (Post-Brexit)

UK-Italy Double Tax Treaty for STR Rental Income 2026 (Post-Brexit)

The 1988 UK-Italy double tax convention is the legal anchor that prevents you from paying tax twice on your Italian Airbnb income. Below we walk through art. 6 (immovable property), art. 24 (elimination of double taxation), how to file SA106 with HMRC and how Brexit changed the practical mechanics.

The convention between the United Kingdom and the Italian Republic for the avoidance of double taxation was signed in Pallanza on 21 October 1988 and entered into force in 1990. It survived Brexit unchanged because it sits outside the EU framework. For a UK resident running a short-term rental in Tuscany, Lake Como or Sicily, this treaty is the reason you do not pay UK income tax on top of the cedolare secca already paid in Italy.

Article 6: Income From Immovable Property

Article 6 of the convention assigns primary taxing rights for income derived from immovable property to the country where the property is located. For a UK landlord with an Italian villa, this means:

• Italy has the first taxing right on rental income from the Italian property
• The UK retains the right to tax the same income under UK domestic law (UK residents are taxed on worldwide income)
• Double taxation is then eliminated through the Foreign Tax Credit Relief mechanism in art. 24

This applies to any form of rental: long-term locazione, short-term affitto breve, holiday lets through Airbnb, Booking.com or Vrbo. The classification on the Italian side (cedolare 21%, cedolare 26%, IRPEF, P.IVA imprenditoriale) does not change the treaty allocation: Italy first, UK credit relief.

Article 24: Elimination of Double Taxation

Article 24 paragraph 3 of the UK-Italy convention obligates the UK to grant a credit against UK tax for any Italian tax paid on Italian-source income. The credit is limited to the UK tax that would otherwise be payable on the same income (the "ordinary credit" method).

Practical consequence: if your effective Italian tax rate on the Italian rental is lower than your UK marginal rate, you pay the difference in the UK. If higher (rare for STR after cedolare), the credit is capped and you cannot recover the excess from HMRC.

Worked example for a UK higher-rate taxpayer:

Item	Amount	Notes
Italian gross rental income	GBP 30,000	Florence flat, Airbnb only
Italian cedolare secca 21%	GBP 6,300	Paid via F24 in two instalments
UK taxable foreign income	GBP 30,000	SA106 Foreign Pages
UK tax at 40% higher rate	GBP 12,000	Before credit
Foreign Tax Credit Relief	(GBP 6,300)	Capped at UK tax on the income
Net UK tax due	GBP 5,700	HMRC payment
Total tax paid (IT + UK)	GBP 12,000	Equals the higher of the two rates

Filing SA106 With HMRC: Step by Step

SA106 Foreign Pages is the schedule attached to your annual SA100 Self Assessment. The deadlines: 31 October paper, 31 January online (for the previous tax year ended 5 April).

1. Box 14 (income from land and property abroad): enter gross Italian rental income converted to GBP at the HMRC monthly average exchange rate or the spot rate on receipt
2. Box 22 (foreign tax paid): enter cedolare secca paid in EUR converted to GBP at the same rate
3. Tick "claim Foreign Tax Credit Relief": this triggers the credit mechanism under art. 24 of the treaty
4. Attach the Italian commercialista's calcolo cedolare: not required by HMRC but useful in the event of an enquiry

Permanent Establishment Risk for Larger Operations

If you operate three or more Italian properties, manage them actively from the UK, employ Italian staff or have a UK-registered Ltd that holds the Italian portfolio, the question of permanent establishment under art. 5 of the treaty arises. A UK Ltd with an Italian PE is taxed in Italy on the PE-attributable profits at 24% IRES plus IRAP, and the UK then grants credit relief.

The threshold is fact-specific. The Agenzia delle Entrate has historically been aggressive on this topic. A single Italian Airbnb run from London is safe. Three or more, with an Italian property manager acting as your agent, can trigger PE.

Brexit Changes That Do Affect You

The treaty itself is unchanged. But supporting EU-era simplifications are gone:

• VAT MOSS: pre-Brexit, a UK landlord registered for VAT MOSS could declare EU VAT through HMRC. Post-Brexit, you register directly with Agenzia delle Entrate via the OSS scheme if you exceed the EUR 65,000 P.IVA threshold
• EU mutual administrative assistance: replaced by DAC7-style data exchange between Agenzia delle Entrate and HMRC, which actually means more transparency, not less
• EU passport for healthcare and legal advice: UK lawyers and accountants can no longer cross-advise on Italian tax without partnering with an Italian commercialista

FX Conversion Rules: HMRC Versus Agenzia Delle Entrate

One of the practical headaches of UK-Italy STR taxation is currency conversion. Italy taxes you in EUR, the UK in GBP, and the conversion rule used can shift the tax bill by 5% to 10%.

• HMRC accepted methods: spot rate on the date of receipt, monthly average from HMRC's published exchange rates, or yearly average. You must use the same method consistently across SA106
• Agenzia delle Entrate: gross income recognised at receipt in EUR; no conversion question on the Italian side because cedolare and IRPEF are computed in EUR
• Mismatch risk: if you use different methods between Italian commercialista accounts and HMRC SA106, the gross figures diverge and trigger a Connect-system flag

Best practice: pick the HMRC monthly average as the single conversion method. Apply it to each Airbnb payout in EUR to get GBP, sum to annual total. Document in a spreadsheet and keep with the SA106 supporting papers.

Mortgage Interest and Other Italian Deductions on UK SA106

If you finance the Italian property with a UK or Italian mortgage, the interest is deductible against the rental income on SA106 box 27. Important UK rules:

• From April 2020 the UK fully restricts mortgage interest relief for residential rental: relief is given as a basic-rate (20%) tax credit, not as a full deduction
• The restriction applies whether the property is in the UK or abroad, including Italian holiday lets
• If the property qualifies as Furnished Holiday Letting (FHL) under HMRC rules, the restriction does not apply, but FHL status requires meeting strict availability and letting thresholds (210 days available, 105 days actually let)

Most Italian Airbnb properties qualify as FHL because they hit the let-day thresholds easily in tourist regions. Confirm with your accountant on the FHL election; it dramatically improves the tax position for UK landlords with mortgaged Italian properties.

HMRC Enquiry Triggers for UK-Italy STR Income

Three patterns we see flagged by HMRC compliance teams:

• Italian rental income reported on SA106 but no Foreign Tax Credit Relief claimed (HMRC suspects undeclared Italian tax)
• Income reported in one year but Italian tax paid in the next (mismatch between Italian and UK accounting periods)
• DAC7 data from Airbnb showing GBP 25,000 of Italian payouts but only GBP 18,000 declared on SA106 (a EUR 7,000 gap raises an automatic enquiry)

Frequently Asked Questions

Does the UK-Italy treaty apply to short-term Airbnb rentals or only long-term leases?

It applies to both. Article 6 covers all income from immovable property regardless of contract length or commercial nature. Whether the income is taxed in Italy as cedolare secca, IRPEF or imprenditoriale, the treaty allocation (Italy first, UK credit) is identical.

Can I claim UK personal allowance against my Italian rental income?

If you are UK tax resident, yes. The personal allowance applies to your total taxable income, including foreign rental, before tax bands are calculated. If you are non-UK resident with only Italian rental and UK property income, the personal allowance is restricted to UK-source income only (and UK-source rental is then taxed independently of Italian-source).

What about NI contributions on Italian rental income?

None. UK National Insurance is not due on rental income, foreign or domestic, because rental is not earnings from employment or self-employment. This is true regardless of the treaty.

Do I file SA106 if I made a loss in Italy?

Yes. Italian rental losses are reportable on SA106 and can be carried forward against future Italian rental profits within UK tax computation. They cannot offset UK-source income.

Can I use the remittance basis to avoid UK tax on Italian rental?

Only if you are non-domiciled in the UK and elect the remittance basis on form SA109. Income that stays in your Italian bank account and is not remitted to the UK escapes UK tax (but loses the personal allowance and incurs the GBP 30,000 to GBP 60,000 remittance basis charge for long-term residents). Most STR landlords do not benefit from this.

What documentation should I keep for HMRC?

Keep for 6 years: Italian Modello Redditi PF copies, F24 receipts proving cedolare payment, Airbnb and Booking annual payout reports, bank statements showing the receipts in EUR, and any commercialista invoices. HMRC enquiries can reach back 4 years (6 with carelessness, 20 with deliberate non-disclosure).

Need a foundation document set for your Italian Airbnb that aligns with both Italian compliance and HMRC reporting? Check the Standard Package HostReady (Italy): ready-made autocertificazioni, GDPR notice and a complete CIN BDSR registration walkthrough designed for UK landlords.