HM Revenue & Customs Exchange Rate API

Official HM Revenue & Customs (United Kingdom) monthly exchange rates as JSON: 150 currencies, history back to 2021. The published GBP rates required for tax, audits, and compliant invoicing.

HM Revenue & Customs official monthly exchange rates as JSON: 150 currencies against the GBP, history back to 2021. Latest table on every plan. Get your API key.

About HM Revenue & Customs

HM Revenue & Customs is the United Kingdom's tax, payments, and customs authority. It publishes one official exchange rate table per calendar month — released ahead of the month it applies to — and that single rate is what UK customs declarations and VAT invoices must use for the whole month, regardless of how the market moves in between.

• Official website: www.gov.uk/government/organisations/hm-revenue-customs
• Official rate publication: Monthly exchange rates for customs and VAT

Quick start

One request for the pair you need — GBP to USD at the official HM Revenue & Customs rate:

curl "https://allratestoday.com/api/v1/central-bank/hmrc/latest?source=GBP&target=USD" \
  -H "Authorization: Bearer art_live_your_key"

Or the bank's full published table:

curl "https://allratestoday.com/api/v1/central-bank/hmrc/latest" \
  -H "Authorization: Bearer art_live_your_key"

On paid plans, any historical date or a time series:

curl "https://allratestoday.com/api/v1/central-bank/hmrc/history?source=GBP&target=USD&from=2025-01-01" \
  -H "Authorization: Bearer art_live_your_key"

Latest published rates (2026-08-01)

The most recent table as published by HM Revenue & Customs — exactly what the /latest endpoint returns right now. Values are GBP per 1 unit of each currency:

Base	Quote	Type	Rate
GBP	AED	monthly	4.9091
GBP	ALL	monthly	109.7955
GBP	AMD	monthly	488.5373
GBP	AOA	monthly	1224.3306
GBP	ARS	monthly	1975.2991
GBP	AUD	monthly	1.9112
GBP	AWG	monthly	2.3927
GBP	AZN	monthly	2.2724
GBP	BAM	monthly	2.292
GBP	BBD	monthly	2.6734
GBP	BDT	monthly	164.9731
GBP	BHD	monthly	0.5026
GBP	BIF	monthly	3987.4698
GBP	BMD	monthly	1.3367
GBP	BND	monthly	1.7262
GBP	BOB	monthly	14.4494
GBP	BRL	monthly	6.7858
GBP	BSD	monthly	1.3367
GBP	BTN	monthly	129.0145
GBP	BWP	monthly	18.2092
GBP	BYN	monthly	3.8578
GBP	BZD	monthly	2.6915
GBP	CAD	monthly	1.8835
GBP	CDF	monthly	3083.1421
GBP	CHF	monthly	1.0863
GBP	CLP	monthly	1250.6398
GBP	CNY	monthly	9.0479
GBP	COP	monthly	4314.3386
GBP	CRC	monthly	606.4354
GBP	CUP	monthly	32.0872
GBP	CVE	monthly	129.226
GBP	CZK	monthly	28.3253
GBP	DJF	monthly	238.003
GBP	DKK	monthly	8.7609
GBP	DOP	monthly	77.7899
GBP	DZD	monthly	177.9594
GBP	EGP	monthly	68.6327
GBP	ERN	monthly	20.0508
GBP	ETB	monthly	215.7325
GBP	EUR	monthly	1.1719
GBP	FJD	monthly	2.9874
GBP	GEL	monthly	3.5045
GBP	GHS	monthly	15.5267
GBP	GMD	monthly	98.7774
GBP	GNF	monthly	11726.9754
GBP	GTQ	monthly	10.1958
GBP	GYD	monthly	279.6097
GBP	HKD	monthly	10.4805
GBP	HNL	monthly	35.7968
GBP	HTG	monthly	174.7475
GBP	HUF	monthly	426.6463
GBP	IDR	monthly	23940.4179
GBP	ILS	monthly	4.0939
GBP	INR	monthly	129.0145
GBP	IQD	monthly	1751.2405
GBP	ISK	monthly	167.5923
GBP	JMD	monthly	212.116
GBP	JOD	monthly	0.9477
GBP	JPY	monthly	217.9907
GBP	KES	monthly	172.9979
GBP	KGS	monthly	116.8827
GBP	KHR	monthly	5399.6005
GBP	KMF	monthly	576.5395
GBP	KRW	monthly	1979.0292
GBP	KWD	monthly	0.4145
GBP	KYD	monthly	1.1117
GBP	KZT	monthly	624.7684
GBP	LAK	monthly	30210.7962
GBP	LBP	monthly	119912.1356
GBP	LKR	monthly	449.5212
GBP	LRD	monthly	241.9123
GBP	LSL	monthly	22.0219
GBP	LYD	monthly	8.577
GBP	MAD	monthly	12.5477
GBP	MDL	monthly	23.5148
GBP	MGA	monthly	5702.5645
GBP	MKD	monthly	72.1754
GBP	MMK	monthly	2806.6019
GBP	MNT	monthly	4799.6502
GBP	MOP	monthly	10.7949
GBP	MRU	monthly	53.3836
GBP	MUR	monthly	63.1965
GBP	MVR	monthly	20.665
GBP	MWK	monthly	2317.8777
GBP	MXN	monthly	23.2925
GBP	MYR	monthly	5.4633
GBP	MZN	monthly	85.3111
GBP	NGN	monthly	1838.2793
GBP	NIO	monthly	49.1887
GBP	NOK	monthly	12.8322
GBP	NPR	monthly	206.5199
GBP	NZD	monthly	2.2978
GBP	OMR	monthly	0.5141
GBP	PAB	monthly	1.3367
GBP	PEN	monthly	4.5467
GBP	PGK	monthly	5.98
GBP	PHP	monthly	82.5755
GBP	PKR	monthly	371.3406
GBP	PLN	monthly	5.0757
GBP	PYG	monthly	8093.9309
GBP	QAR	monthly	4.8657
GBP	RON	monthly	6.1387
GBP	RSD	monthly	137.5785
GBP	RUB	monthly	105.0552
GBP	RWF	monthly	1966.3449
GBP	SAR	monthly	5.0127
GBP	SBD	monthly	10.7861
GBP	SCR	monthly	18.7582
GBP	SDG	monthly	802.2719
GBP	SEK	monthly	12.9869
GBP	SGD	monthly	1.7262
GBP	SLE	monthly	30.6308
GBP	SOS	monthly	763.0606
GBP	SRD	monthly	50.4674
GBP	SVC	monthly	11.6963
GBP	SZL	monthly	22.0219
GBP	THB	monthly	45.203
GBP	TMT	monthly	4.6756
GBP	TND	monthly	3.9407
GBP	TOP	monthly	3.2194
GBP	TRY	monthly	63.1095
GBP	TTD	monthly	9.0721
GBP	TWD	monthly	43.3972
GBP	TZS	monthly	3528.7398
GBP	UAH	monthly	59.9097
GBP	UGX	monthly	4995.2411
GBP	USD	monthly	1.3367
GBP	UYU	monthly	53.6316
GBP	UZS	monthly	16045.3862
GBP	VES	monthly	984.1686
GBP	VND	monthly	35216.6818
GBP	VUV	monthly	159.1429
GBP	WST	monthly	3.6653
GBP	XAF	monthly	768.7193
GBP	XCD	monthly	3.6196
GBP	XOF	monthly	768.7193
GBP	XPF	monthly	139.8455
GBP	YER	monthly	318.1262
GBP	ZAR	monthly	22.0219
GBP	ZMW	monthly	24.5976
GBP	ZWG	monthly	35.8198

Node.js / TypeScript client

A dedicated zero-dependency npm package wraps these endpoints — hmrc-exchange-rate:

npm install hmrc-exchange-rate

import { getRate } from 'hmrc-exchange-rate';

const pair = await getRate('GBP', 'USD', { apiKey: 'art_live_...' });
console.log(pair.rate, pair.rate_date);

Zero dependencies, TypeScript types included, and it runs anywhere fetch exists — Node 18+, Bun, Deno, and edge runtimes.

Why use the official HM Revenue & Customs rate?

Live market rates move continuously, but tax filings, customs declarations, audits, and statutory accounting in United Kingdom and beyond typically require the official rate published by HM Revenue & Customs for a given date — a fixed, citable number that never changes after publication. This API serves those published tables with the bank's own rate_date on every response; weekends and holidays return the most recent published date, which is the rate compliance rules require you to apply.

Pairs the bank doesn't print directly are resolved from its table (inverse or cross via GBP) and explicitly flagged "derived": true — so what the bank printed and what was computed are never confused.

Endpoints

• GET /api/v1/central-bank/hmrc/latest — latest table or single pair (all plans)
• GET /api/v1/central-bank/hmrc/{YYYY-MM-DD} — the table for any date (paid plans)
• GET /api/v1/central-bank/hmrc/history — time series, up to 5,000 rows (paid plans)
• GET /api/v1/central-bank/hmrc/availability — publication calendar: the dates the bank actually published (all plans)

Full parameter reference in the API documentation. Every request counts toward your plan's monthly quota — rates change once a month, so caching a published table locally makes a small quota go far.

Frequently asked questions

Is there an API for HM Revenue & Customs exchange rates?

Yes — this one. Official monthly GBP rates as clean JSON, latest table on every plan including free.

How often are the rates updated?

HM Revenue & Customs publishes monthly — one official table per calendar month, published ahead of the month it applies to; the API ingests each new table shortly after publication (latest: 2026-08-01).

Are these the official rates?

Yes — ingested from HM Revenue & Customs's own published data, served unmodified with the bank's publication date. Anything computed rather than published is flagged derived.

Other tax authorities

All covered tax authoritiesCoverage, endpoints, and plans U.S. Department of the TreasuryUnited States — official USD rates Central bank rates APIOfficial rates from 34 central banks