Gibraltar: foreign-tax relief, UK coordination and corporate exit working papers

Who this applies to

Scope and eligibility

The first sections address section 37 domestic relief. The separate UK treaty section below has its own entitlement conditions. Begin with the actual Gibraltar charge, foreign charge and the profits or gains to which each relates. Section 37(1) requires proof satisfactory to the Commissioner that the person has paid, by deduction or otherwise, or is liable to pay tax in both jurisdictions on the same profits or gains. It is not enough that a group company paid tax elsewhere on unrelated income. Income Tax Act, section 37(1).

The basic amount is the lesser of Gibraltar tax attributable to those profits or gains and foreign income tax on that income, subject to the further limitations below. Foreign “income tax” includes a tax calculated on a similar basis or of a similar nature to Gibraltar income tax. Do not treat a foreign payment as creditable merely because its name includes “tax”; establish its legal character. Section 37(1) and (7).

Source restriction and residence-only exclusion

Section 37(8) limits the provision to tax paid in the country in or from which the revenue generated by the underlying business activity arose. Identify that activity and revenue source with contracts, invoices and operational evidence; the payer's address alone is not a completed source analysis. Section 37(8).

Section 37(8A) excludes Gibraltar tax on Gibraltar-source income where the provision would otherwise apply only because the taxpayer's foreign country of tax residence charges that income on the basis of residence. Do not use a blanket “taxed twice, therefore Gibraltar grants the credit” rule for that situation. Relief in the other country or under an applicable agreement requires its own analysis. Section 37(8A).

Section 37(1) refers to tax paid or payable while subsection (8) uses tax paid. If a proposed claim concerns assessed but unpaid foreign tax, reconcile those provisions and the evidence required with the Commissioner before relying on the credit. This Guide does not resolve that interaction by deleting either qualification.

Rates, bands and thresholds

Item	Amount or test	Tax year	Official source
Section 37 domestic relief	Lesser of attributable Gibraltar tax and qualifying foreign tax, subject to the further limitations	2026	Income Tax Act, section 37(1)–(8A)
Ordinary domestic claim limit	Six years after the relevant assessment year or accounting period ends	2026	Income Tax Act, section 37(5)
Later material adjustments	Special six-year route from completion of all material assessments, adjustments and determinations	2026	Income Tax Act, section 37(6)
Gibraltar-side UK treaty credit	Lesser of Gibraltar and UK tax due on the same income, subject to treaty entitlement and exclusions	2026	UK–Gibraltar agreement, Article 22(1), (3)
UK underlying dividend-tax credit route	At least 10% of voting power plus Article 22(2)(d) and UK-law conditions	2026	UK–Gibraltar agreement, Article 22(2)(d)
Corporate residence-exit base	Exit-date market value less tax value, for assets within paragraph 18A(2); retained Gibraltar PE assets excluded	2026	Schedule 4, paragraph 18A(1)(c), (2), (9)
Conditional exit deferral	Over five years; specified destination and recovery/guarantee conditions	2026	Schedule 4, paragraph 18A(3)–(5)
Uncorrected instalment failure	Reasonable correction period not exceeding 12 months; not an automatic grace period	2026	Schedule 4, paragraph 18A(6)(e)

This Guide calculates relief and an exit base. It sets no universal income-tax rate, foreign basis, instalment amount or currency-conversion rule.

The base

Allocate the Gibraltar tax before applying the cap

Section 37(4) attributes Gibraltar tax proportionately:

Gibraltar tax on the relevant income = total Gibraltar tax before section 37 relief × relevant charged profits or gains ÷ total charged profits or gains.

Use the amounts actually charged for the relevant assessment year or accounting period. Do not substitute worldwide revenue, accounting profit or a headline tax rate without reconciling them to the statutory numerator and denominator. A nil denominator or disputed allocation needs separate analysis. Section 37(4).

Example: total charged profits are £100,000, of which £40,000 are the relevant income. Total Gibraltar tax before section 37 relief is assumed to be £15,000. The allocated tax is £15,000 × £40,000 / £100,000 = £6,000. If qualifying foreign tax on that same income is £8,000, the initial relief is min(£6,000, £8,000) = £6,000. If it is £4,500, the initial relief is £4,500. These are computational examples assuming all source and eligibility conditions are met, not a determination of the tax rate or income source.

Account for relief allowed abroad

Section 37(2) reduces Gibraltar relief by the amount of relevant unilateral relief allowable abroad for Gibraltar tax on those profits or gains. Section 37(3) calculates the foreign tax before that foreign unilateral relief and permits a certificate from the corresponding foreign tax authority as evidence of the tax or relief amount. Do not deduct the foreign relief twice or ignore it because it has not yet been claimed. Section 37(2)–(3).

Continuing the £6,000 initial-relief example, if the relevant foreign unilateral relief allowable is £2,000, the reduction leaves £4,000 of Gibraltar relief under the stated arithmetic. The actual foreign entitlement must be evidenced under that country's law. This example does not address a case where the foreign reduction exceeds the initial Gibraltar relief.

Corporate tax-residence exit: scope and base

This separate section applies to the defined corporate taxpayer in Schedule 4 paragraph 8A, with assessable income and an established tax-residence transfer. It is not an individual departure-tax rule. Paragraph 8A defines a tax-residence transfer by ceasing to be resident for tax purposes in Gibraltar while acquiring foreign tax residence. Establish that event; moving a registered office or an employee alone does not establish the statutory facts. This section does not decide company residence or a treaty conflict. Paragraph 8A, printed page 190.

Paragraph 18A(1)(c) covers a taxpayer transferring tax residence to the UK, an EU Member State or a third country, except assets remaining effectively connected with a Gibraltar permanent establishment. For assets within the charge, paragraph 18A(2) measures the base as market value at exit less value for tax purposes, limited to assets which would otherwise produce assessable income under the Act. Paragraph 18A(9) defines market value using willing unrelated buyers and sellers in a direct transaction. An accounting book value is not automatically the statutory tax value or market value. Apply the actual section 24 rate only after establishing the taxpayer and income category; this section calculates a base, not a universal tax rate. Paragraph 18A(1)(c), (2), (9), printed pages 202–204.

Prepare an asset-by-asset schedule showing the tax-residence event, Gibraltar taxing right, assessable-income character, retained-PE connection, exit-date market value, tax value and resulting base. Do not include the whole balance sheet merely because the company relocates. Reconcile later disposals and credits separately; this section does not determine another jurisdiction's starting tax value. Coordinate the resulting working paper with the corporate-tax Guide; stock cessation and capital-allowance pool adjustments are distinct methods, not automatic replacements for paragraph 18A.

Deadlines and filing

Claim and adjustment deadlines

An ordinary section 37 claim must be made no later than six years after the end of the assessment year or accounting period concerned. For an accounting period ending 31 December 2025, that gives 31 December 2031. This claim limit does not defer the ordinary return or payment deadline. Section 37(5); corporate tax Guide.

A later adjustment to Gibraltar tax, foreign tax or relevant foreign relief can make the original credit excessive or insufficient. Section 37(6) provides a special assessment/claim route within six years from the time all material assessments, adjustments and determinations have been made. Record those events; do not assume the ordinary deadline alone closes the case or that every foreign payment restarts it. Section 37(6).

Claim working paper

Prepare and retain:

1. Identification of the person, both tax periods and the same income taxed in each jurisdiction.
2. The Gibraltar computation before relief and the section 37(4) allocation.
3. The foreign assessment, withholding certificate or payment evidence, with tax type and legal basis.
4. Evidence of the underlying business activity and revenue source, with the subsection (8A) exclusion considered explicitly.
5. The foreign unilateral-relief analysis, any authority certificate, and the resulting Gibraltar adjustment.
6. The claim date, submission evidence and a log of later foreign or Gibraltar revisions.

These are suggested evidence controls to support the statutory test, not an assertion that a particular claim form has been verified. Preserve records under the bookkeeping and tax-records Guide.

Independent country review findings and the bounded repair closure are recorded in the country research archive; professional attestation is pending. Claim forms, foreign-currency conversion, disputed sourcing, assessed-but-unpaid tax and the application of any treaty require further verification. This Guide does not establish comprehensive cross-border coverage or promise a refund of excess foreign tax.

The corporate return/payment calendar is separate from the section 37 claim limit. Use the corporate-tax Guide. Current domestic claim/correction submission and exit-deferral application, dates and amounts remain unverified here.

Penalties and interest

This Guide does not supply a separate late-claim penalty or exit-tax interest figure. Current exit-deferral interest treatment remains unverified. Use the separately sourced corporate-tax Guide for its return/payment surcharge scope; a relief computation or proposed deferral does not establish that payment interest or penalties are waived.

Cross-border points

UK treaty: Article 22 coordination

Establish entitlement under Articles 1, 4 and 28 and the applicable Article 29 commencement before applying the credit article. Use the UK investment-income Guide for residence, beneficial ownership and payment categories, and the employment/pensions Guide for those income types. A domestic section 37 claim is not itself proof of treaty eligibility. UK–Gibraltar agreement.

For a Gibraltar resident, Article 22(1)(a) permits Gibraltar to include income that the agreement allows the UK to tax in its tax base. Paragraph (1)(b) then requires a deduction from tax equal to the lesser of Gibraltar tax due and UK tax due on the same income, under their respective laws, where the agreement permits UK taxation. This is relief from tax, not a deduction of the foreign tax from gross income. Paragraph (3) excludes this Gibraltar relief where UK taxation is permitted by the agreement solely because the income, profits or gains are also derived by a UK resident. Record the treaty basis of the UK's charge; evidence that UK tax was paid does not settle this exclusion. Article 22(1), (3).

For the UK side, Article 22(2) is expressly subject to UK credit/exemption law, without affecting the stated general principle. Paragraph (a) provides credit for Gibraltar tax payable under Gibraltar law and in accordance with the agreement, on the same Gibraltar-source profits, income or gains, directly or by deduction. Its dividend rule initially excludes tax on the underlying company profits. Paragraphs (b) and (c) provide for UK exemption of qualifying company dividends and Gibraltar permanent-establishment profits when the applicable UK-law exemption conditions are met. They do not make every Gibraltar dividend or branch exempt. Article 22(2)(a)–(c).

For a dividend paid by a Gibraltar-resident company and not exempt under paragraph (b), paragraph (d) extends the credit to take account of underlying Gibraltar company tax where the UK-resident recipient company controls, directly or indirectly, at least 10% of the payer's voting power. Exactly 10% meets that threshold; 9.99% does not meet this particular underlying-tax route. Voting power, rather than a nominal shareholding percentage alone, controls this test. Income and gains of a UK resident that the agreement allows Gibraltar to tax are deemed Gibraltar-source for paragraph (2). Actual UK exemption elections, credit limits, underlying-tax allocation, claim deadlines and return fields require separate UK-law verification. Article 22(2)(d) and final sentence.

Article 22(4) supplies the opposite-direction exclusion: paragraph (2) does not apply where Gibraltar taxation is permitted by the agreement solely because the relevant income, profits or gains are also income derived by a Gibraltar resident. Check this separately from paragraph (3), which limits the Gibraltar-side relief. Article 22(3)–(4).

Keep a single reconciliation of domestic relief, treaty relief and foreign repayments. Do not add the section 37 result to the treaty result as two independent credits for the same tax. Identify the legal route, same-income allocation, treaty-compliant source charge, residence-only exclusion and any later revision. The filing mechanism and interaction between particular domestic restrictions and treaty obligations remain to verify; this section does not apply every section 37 condition or its six-year deadline automatically to a treaty claim.

Conditional exit-tax deferral and later changes

For the tax-residence-transfer route, paragraph 18A(3)(c) permits payment in instalments over five years on the listed UK/EU/EEA transfers. For an EEA third country, paragraph (4) additionally requires an agreement for mutual assistance in recovery of tax claims. Do not extend that deferral to every third country or infer an equal-annual instalment amount/calendar from the words “over five years”. Where there is a demonstrable and actual non-recovery risk, the Commissioner may require a guarantee under paragraph (5). The current application channel, payment dates, instalment amounts and interest treatment still require operational authority; a prepared computation is not an approved payment schedule. Paragraph 18A(3)–(5), printed pages 202–203.

Deferral ends immediately and the debt becomes recoverable in the paragraph 18A(6) cases: sale or disposal of transferred assets/business; the specified subsequent third-country transfers of assets, residence or PE business; bankruptcy, insolvency or winding-up; and failure to honour instalments without correction within a reasonable period not exceeding 12 months. That last limit is not an automatic twelve-month grace period for each missed instalment. Paragraph (7)'s EEA recovery-agreement exception applies only to the specified subsequent-transfer limbs; it does not neutralise the sale, insolvency or non-payment limbs. Keep the actual events, dates, authority schedule and recovery status. Paragraph 18A(6)–(7), printed page 203.

For the separate inbound route from the UK or an EU Member State, paragraph 18A(8) requires acceptance of the transferor jurisdiction's established value as the starting tax value unless it does not reflect market value. This does not establish an unrestricted step-up for an inbound transfer from every country. The specified temporary asset transfers in paragraph (10) have their own condition that assets are set to revert to the UK or an EU Member State as transferor within 12 months, and concern securities financing, collateral, prudential capital or liquidity management. They are not a general one-year exemption for a company relocation. Paragraph 18A(8)–(10), printed pages 203–204.

Remaining asset-transfer textual limit: paragraphs 18A(1)(a)–(b) describe loss of Gibraltar's taxing right on head-office/PE asset transfers, while paragraph 8A's “transfer of assets” definition instead refers to the UK or an EU Member State losing that right. The tax-residence illustration in section 7 does not reconcile that mismatch or certify every asset-only/PE-business transfer. Preserve the exact relevant limb and obtain its legal reconciliation before using a generic outbound asset-transfer calculation. Paragraphs 8A and 18A(1), printed pages 190 and 202.

Two worked examples that recompute

Example 1: same-income treaty credit and lower-credit boundary

Conditional example: assume treaty eligibility, permitted UK taxation, no paragraph (3) exclusion and independently established tax on the same income of £6,000 in Gibraltar and £8,000 in the UK. The Article 22(1) deduction is £6,000, leaving zero Gibraltar tax on that component. If UK tax due instead is £4,500, the deduction is £4,500 and the Gibraltar balance on that component is £1,500. The excess £2,000 UK tax in the first case is not a Gibraltar refund under this formula. The inputs are assumed liabilities, not prescribed domestic rates or proof that foreign withholding complied with the treaty.

name: Gibraltar resident Article 22 same-income credit limits
inputs:
  gibraltar_tax_on_same_income: 6000
  higher_uk_tax_due: 8000
  lower_uk_tax_due: 4500
steps:
  - first_credit: min(gibraltar_tax_on_same_income, higher_uk_tax_due)
  - first_gibraltar_balance: gibraltar_tax_on_same_income - first_credit
  - second_credit: min(gibraltar_tax_on_same_income, lower_uk_tax_due)
  - second_gibraltar_balance: gibraltar_tax_on_same_income - second_credit
expected:
  first_credit: 6000
  first_gibraltar_balance: 0
  second_credit: 4500
  second_gibraltar_balance: 1500

Example 2: corporate residence-exit base and retained-PE boundary

Ordinary example: assume the corporate taxpayer and residence-transfer charge are established; one asset is within paragraph 18A(2), no Gibraltar PE retains it, its supported exit-date market value is £1,000,000 and tax value is £600,000. The exit base is £400,000. The example does not establish residence, value, tax rate, treaty relief or a filing/payment schedule.

name: Gibraltar corporate tax-residence exit base
inputs:
  supported_exit_market_value: 1000000
  established_tax_value: 600000
steps:
  - exit_tax_base: supported_exit_market_value - established_tax_value
expected:
  exit_tax_base: 400000

Retained-PE boundary: on the same charge assumptions, a second asset with market value £300,000 and tax value £150,000 remains effectively connected with a Gibraltar PE. It is excluded from this tax-residence-transfer charge by paragraph 18A(1)(c); do not add its £150,000 difference to the first asset's £400,000 exit base. That exclusion does not declare a later disposal tax-free. The supplementary boundary control records the arithmetic after those asset classifications have been established. Negative-value cases, disputed valuations and overlapping adjustments are outside these illustrations.

Ask the client first

1. Who is the taxpayer, what are the relevant tax periods and residence facts, and which corporate or individual scope applies?
2. Which same profits or gains bear each tax, where did the underlying activity generate the revenue, and what assessments/payment evidence exist?
3. What foreign unilateral relief, repayments or later adjustments are allowable or pending?
4. Which treaty article permits the source charge, and are entitlement and residence-only exclusions satisfied?
5. For a corporate exit, what event, asset classifications, retained Gibraltar PE connections, market values and tax values are established?
6. What destination, recovery agreement, guarantee, payment schedule and later events support or terminate any exit deferral?

Sources

Source	Actual new read scope	Read on
Income Tax Act 2010, 23 March 2026 consolidation	Complete section 37; paragraph 8A taxpayer/transfer definitions and complete paragraph 18A(1)–(10), printed pages 97–99, 190 and 202–204	2026-10-28
UK–Gibraltar agreement, official text	Articles 1, 4, 22, 28 and 29 actually read for the full current quote ledger; earlier completed treaty reviews retained	2026-10-28

The complete rule ledger and old-topics map and independent country review records identify the exact revisions checked, findings and bounded repair closure. Earlier reviews retain their stated scopes. This remains a source-cited draft; professional attestation is pending.

Not yet confirmed: domestic relief claim/correction submission and foreign-currency conversion, assessed-but-unpaid tax and disputed source cases; actual exit-tax deferral applications, payment dates/amounts and interest treatment; the paragraph 8A asset-transfer-definition mismatch with 18A(1)(a)–(b), other asset-only/PE-business transfer applications, disputed/negative valuations and overlapping reliefs. Other treaty corridors and individual departures are not established by the corporate tax-residence example.