Desk 2 · two destinations

Vietnam vs Portugal on a British passport

Verified 2026-08How facts work SourcesNationality is fixed. Cells are filed on each dest tax hub. Overlays are separate pair URLs.

Passport hub: From United Kingdom · home × land: UK × Vietnam · UK × Portugal.

Filed cells

Tax, stay and earn lenses from dest hubs — not invented fees. Purpose framing:

Work · remote · retire — which rows matter

Work — earn gate + tax days. Overlay for treaty short-stay.
Remote — stay instrument + foreign-income rule. Overlay for home traps.
Retire — stay instrument + pension articles on the overlay. Spend-down compare lives on ThonRetire.

Lens	Vietnam	Portugal
Tax-residence day test	183 days Source Luật Thuế TNCN 109/2025/QH15 Điều 2 khoản 2 điểm a; NĐ 253/2026/NĐ-CP Điều 4 khoản 1 Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	183 days Source Autoridade Tributária English tax-residency rules page + CIRS Art. 16(1)(a) — resident if stayed in Portugal for more than 183 days (consecutive or interrupted) in any 12-month period beginning or ending in the tax year in question Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Foreign / worldwide income	yes Source Luật 109/2025/QH15 Điều 2 khoản 1; NĐ 253/2026/NĐ-CP Điều 6 khoản 2 điểm a Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source AT tax-residency rules — residents typically pay tax on all their income, whether from Portugal or abroad; non-residents only pay tax on Portugal-source income Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Top personal rate	35% Source Luật 109/2025/QH15 Điều 9 — bậc 5 Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	48% Source CIRS Art. 68(1) (Lei 73-A/2025) — AT irs68 table: superior a €86,634; taxa normal 48,00% (ninth escalão; no taxa média listed) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Long-stay instrument (filed)	yes Source Product map — purpose → entry symbol → TRC (if eligible) → work permit/exemption as four separate decisions Checked Aug 2026 · Band low · Status fresh Method: figures past 2× SLA hide. See /method · /status · /changelog.	7 days/year Source AIMA ARI Art. 90.º-A — the ARI holder must spend at least 7 days in Portugal in the first year and at least 14 days in each subsequent year (a light physical-presence rule, not a residence-for-tax rule) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Local earn gate (filed)	yes Source Bộ luật Lao động 45/2019/QH14 Điều 153 khoản 2 Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	2157 EUR/month Source AIMA Art. 90.º highly-qualified activity — subordinate hire needs an employer declaration of a contract paying at least 1.5× the national average gross annual salary (€2,157/month) or 3× the IAS; for shortage occupations in ISCO major groups 1 and 2 the floor is at least 1.2× the average gross salary (€1,725.60/month) or 2× the IAS (€1,018.52/month). Reference years: 2023 (average salary), 2024 (IAS) Checked Aug 2026 · Band med · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Treaty (UK)	yes Source UK–Vietnam DTA 1994; SI 1994/3216; GOV.UK Vietnam tax treaties Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source GOV.UK 'Portugal: tax treaties' + HMRC DT15600 — the 2025 UK–Portugal Double Taxation Convention (SI 2025 No. 1300), signed in London 15 September 2025, entered into force 29 December 2025; effective in the UK from 1 Jan 2026 (WHT), 1 Apr 2026 (CT), 6 Apr 2026 (IT/CGT), and in Portugal from 1 Jan 2026 Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Employment short-stay	183 days Source SI 1994/3216 Schedule Art 15 — 183 days within any 12 months (one of conditions) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	183 Source UK–Portugal 2025 DTC Art 14(2)(a) — ≤183 days in any twelve-month period Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Relief (double tax)	ordinary tax credit Source SI 1994/3216 Schedule Art 15 / Art 22; nguon/UK_VN_DTA_1994.md Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	ordinary tax credit Source UK–Portugal 2025 DTC Art 21 — Elimination of Double Taxation, UK credit for Portuguese tax Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Art 4	Cascade permanent home → centre of vital interests → habitual abode → nationality → mutual agreement Source SI 1994/3216 Schedule Art 4(2)(a)–(d) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	Cascade permanent home → centre of vital interests → habitual abode → nationality → mutual agreement Source UK–Portugal 2025 DTC Art 4(2) — dual-resident cascade Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
SSA / totalization	no Source GOV.UK Reciprocal agreements + NI38 country lists do not include Vietnam as a UK social security agreement partner Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source GOV.UK NI38 — Portugal is an EU social security agreement country for the UK Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Treaty pensions	yes Source SI 1994/3216 Schedule Art 18(1) — pensions/annuities taxable only in residence state (subject to Art 19(2)) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	—
Foreign-income hinge	yes Source Luật 109/2025/QH15 Điều 2 khoản 1; NĐ 253/2026/NĐ-CP Điều 6 khoản 2 điểm a Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source AT tax-residency rules — residents typically pay tax on all their income, whether from Portugal or abroad; non-residents only pay tax on Portugal-source income Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Home-side traps	yes Source nguon/UK_SIDE_TRAPS.md — HS278 / TCGA s10A / FIG regime; gates only, no dollar bills Checked Aug 2026 · Band low · Status fresh Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source UK domestic rules reuse across destinations (uk_vn_tax / uk_side_traps): Statutory Residence Test, temporary non-residence CGT, remittance→FIG shift from 6 Apr 2025, State Pension uprating geography — the Portugal DTA does not delete them Checked Aug 2026 · Band low · Status fresh Method: figures past 2× SLA hide. See /method · /status · /changelog.

Vietnam

Through a UK lens

StayVisa and residence EarnWork lawfully TaxWho may tax you there Pair overlayUK → VietnamTreaty and home-side traps Home × land deskRead this pair as a desk

Depth: decide · path · 40 fields

Portugal

Through a UK lens

StayVisa and residence EarnWork lawfully TaxWho may tax you there Pair overlayUK → PortugalTreaty and home-side traps Home × land deskRead this pair as a desk

Earn doors we publish

Local hireArticle 88 subordinate work Highly qualifiedArticle 90 floor RemoteDigital nomad track Own a businessIndependent / founder

Other pairs

Vietnam vs ThailandUK Thailand vs MalaysiaUK Vietnam vs PortugalUK Philippines vs IndonesiaUK Malaysia vs PortugalUK Thailand vs PortugalUK

Vietnam vs Portugal on a British passport

Verified 2026-08How facts workSourcesNationality is fixed. Cells are filed on each dest tax hub. Overlays are separate pair URLs.

Filed cells

Tax, stay and earn lenses from dest hubs — not invented fees. Purpose framing:

Work · remote · retire — which rows matter

Work — earn gate + tax days. Overlay for treaty short-stay.
Remote — stay instrument + foreign-income rule. Overlay for home traps.
Retire — stay instrument + pension articles on the overlay. Spend-down compare lives on ThonRetire.

Lens	Vietnam	Portugal
Tax-residence day test	183 days Source Luật Thuế TNCN 109/2025/QH15 Điều 2 khoản 2 điểm a; NĐ 253/2026/NĐ-CP Điều 4 khoản 1 Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	183 days Source Autoridade Tributária English tax-residency rules page + CIRS Art. 16(1)(a) — resident if stayed in Portugal for more than 183 days (consecutive or interrupted) in any 12-month period beginning or ending in the tax year in question Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Foreign / worldwide income	yes Source Luật 109/2025/QH15 Điều 2 khoản 1; NĐ 253/2026/NĐ-CP Điều 6 khoản 2 điểm a Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source AT tax-residency rules — residents typically pay tax on all their income, whether from Portugal or abroad; non-residents only pay tax on Portugal-source income Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Top personal rate	35% Source Luật 109/2025/QH15 Điều 9 — bậc 5 Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	48% Source CIRS Art. 68(1) (Lei 73-A/2025) — AT irs68 table: superior a €86,634; taxa normal 48,00% (ninth escalão; no taxa média listed) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Long-stay instrument (filed)	yes Source Product map — purpose → entry symbol → TRC (if eligible) → work permit/exemption as four separate decisions Checked Aug 2026 · Band low · Status fresh Method: figures past 2× SLA hide. See /method · /status · /changelog.	7 days/year Source AIMA ARI Art. 90.º-A — the ARI holder must spend at least 7 days in Portugal in the first year and at least 14 days in each subsequent year (a light physical-presence rule, not a residence-for-tax rule) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Local earn gate (filed)	yes Source Bộ luật Lao động 45/2019/QH14 Điều 153 khoản 2 Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	2157 EUR/month Source AIMA Art. 90.º highly-qualified activity — subordinate hire needs an employer declaration of a contract paying at least 1.5× the national average gross annual salary (€2,157/month) or 3× the IAS; for shortage occupations in ISCO major groups 1 and 2 the floor is at least 1.2× the average gross salary (€1,725.60/month) or 2× the IAS (€1,018.52/month). Reference years: 2023 (average salary), 2024 (IAS) Checked Aug 2026 · Band med · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Treaty (UK)	yes Source UK–Vietnam DTA 1994; SI 1994/3216; GOV.UK Vietnam tax treaties Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source GOV.UK 'Portugal: tax treaties' + HMRC DT15600 — the 2025 UK–Portugal Double Taxation Convention (SI 2025 No. 1300), signed in London 15 September 2025, entered into force 29 December 2025; effective in the UK from 1 Jan 2026 (WHT), 1 Apr 2026 (CT), 6 Apr 2026 (IT/CGT), and in Portugal from 1 Jan 2026 Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Employment short-stay	183 days Source SI 1994/3216 Schedule Art 15 — 183 days within any 12 months (one of conditions) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	183 Source UK–Portugal 2025 DTC Art 14(2)(a) — ≤183 days in any twelve-month period Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Relief (double tax)	ordinary tax credit Source SI 1994/3216 Schedule Art 15 / Art 22; nguon/UK_VN_DTA_1994.md Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	ordinary tax credit Source UK–Portugal 2025 DTC Art 21 — Elimination of Double Taxation, UK credit for Portuguese tax Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Art 4	Cascade permanent home → centre of vital interests → habitual abode → nationality → mutual agreement Source SI 1994/3216 Schedule Art 4(2)(a)–(d) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	Cascade permanent home → centre of vital interests → habitual abode → nationality → mutual agreement Source UK–Portugal 2025 DTC Art 4(2) — dual-resident cascade Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
SSA / totalization	no Source GOV.UK Reciprocal agreements + NI38 country lists do not include Vietnam as a UK social security agreement partner Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source GOV.UK NI38 — Portugal is an EU social security agreement country for the UK Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Treaty pensions	yes Source SI 1994/3216 Schedule Art 18(1) — pensions/annuities taxable only in residence state (subject to Art 19(2)) Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	—
Foreign-income hinge	yes Source Luật 109/2025/QH15 Điều 2 khoản 1; NĐ 253/2026/NĐ-CP Điều 6 khoản 2 điểm a Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source AT tax-residency rules — residents typically pay tax on all their income, whether from Portugal or abroad; non-residents only pay tax on Portugal-source income Checked Aug 2026 · Band low · Status fresh Open primary URL Method: figures past 2× SLA hide. See /method · /status · /changelog.
Home-side traps	yes Source nguon/UK_SIDE_TRAPS.md — HS278 / TCGA s10A / FIG regime; gates only, no dollar bills Checked Aug 2026 · Band low · Status fresh Method: figures past 2× SLA hide. See /method · /status · /changelog.	yes Source UK domestic rules reuse across destinations (uk_vn_tax / uk_side_traps): Statutory Residence Test, temporary non-residence CGT, remittance→FIG shift from 6 Apr 2025, State Pension uprating geography — the Portugal DTA does not delete them Checked Aug 2026 · Band low · Status fresh Method: figures past 2× SLA hide. See /method · /status · /changelog.