IRS Yearly Average Exchange Rates API: 38 Currencies Against the US Dollar

Internal Revenue Service (yearly average rates) rates for 31 Dec 2025: 1 USD = 0.886 EUR, 1 USD = 0.759 GBP. All 38 currencies published, history back to 2021. Free JSON API for tax, audits, and compliant invoicing.

By Madhushan, Founder & Lead Developer · Updated 31 Dec 2025

Internal Revenue Service (yearly average rates) publishes yearly average exchange rates — 38 currencies against the USD — and this API serves them as JSON, with history back to 2021. The latest table is on every plan. Get your API key.

About Internal Revenue Service (yearly average rates)

The Internal Revenue Service publishes a table of yearly average exchange rates that US taxpayers can use to convert foreign income and expenses into dollars, covering the last five calendar years. The IRS states that it has no official exchange rate and generally accepts any posted rate used consistently, so these are published averages, not official or required rates. The API serves them as foreign currency per US dollar, each dated 31 December of its year. Two punctuation slips in the IRS table are read as intended (0,924 as 0.924 and .73.686 as 73.686), and the Venezuela row is left out because its figure matches no bolívar series we could identify.

• Website: www.irs.gov
• Rate publication: Yearly average currency exchange rates

Quick start

One request for the pair you need — USD to EUR at the Internal Revenue Service (yearly average rates) rate:

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

What comes back — a real response built from the table in force (2025-12-31):

{
  "bank": "irs",
  "name": "Internal Revenue Service (yearly average rates)",
  "rate_date": "2025-12-31",
  "source": "USD",
  "target": "EUR",
  "rate": 0.886,
  "rate_type": "yearly_average",
  "derived": false,
  "method": "published",
  "age_days": 310,
  "stale": false,
  "cadence": "yearly",
  "disclaimer": "Official rates as published by the named central bank. On weekends/holidays the most recent published rate_date is returned."
}

Or the bank's full published table:

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

The full-table response has the same envelope with every published row (first rows shown):

{
  "bank": "irs",
  "name": "Internal Revenue Service (yearly average rates)",
  "rate_date": "2025-12-31",
  "age_days": 310,
  "stale": false,
  "cadence": "yearly",
  "rates": [
    {"base":"USD","quote":"AED","type":"yearly_average","value":3.673},
    {"base":"USD","quote":"AFN","type":"yearly_average","value":69.637},
    {"base":"USD","quote":"ARS","type":"yearly_average","value":1243.369},
    {"base":"USD","quote":"AUD","type":"yearly_average","value":1.551},
    … 34 more rows
  ],
  "disclaimer": "Official rates as published by the named central bank. On weekends/holidays the most recent published rate_date is returned."
}

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

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

Latest published rates (2025-12-31)

The most recent table as published by Internal Revenue Service (yearly average rates) — exactly what the /latest endpoint returns right now. Values are USD per 1 unit of each currency:

Download this table: Excel (.xlsx) CSV (paid plan required)

Base	Quote	Type	Rate
USD	AED	yearly_average	3.673
USD	AFN	yearly_average	69.637
USD	ARS	yearly_average	1243.369
USD	AUD	yearly_average	1.551
USD	BHD	yearly_average	0.377
USD	BRL	yearly_average	5.593
USD	CAD	yearly_average	1.398
USD	CHF	yearly_average	0.831
USD	CNY	yearly_average	7.129
USD	DKK	yearly_average	6.617
USD	DZD	yearly_average	131.627
USD	EGP	yearly_average	49.233
USD	EUR	yearly_average	0.886
USD	GBP	yearly_average	0.759
USD	HKD	yearly_average	7.796
USD	HUF	yearly_average	352.869
USD	ILS	yearly_average	3.451
USD	INR	yearly_average	87.133
USD	IQD	yearly_average	1309.753
USD	ISK	yearly_average	128.262
USD	JPY	yearly_average	149.632
USD	KRW	yearly_average	1421.779
USD	KYD	yearly_average	0.821
USD	LBP	yearly_average	89568.54
USD	MAD	yearly_average	9.344
USD	MXN	yearly_average	19.212
USD	NOK	yearly_average	10.392
USD	NZD	yearly_average	1.719
USD	QAR	yearly_average	3.643
USD	RUB	yearly_average	83.755
USD	SAR	yearly_average	3.751
USD	SEK	yearly_average	9.813
USD	SGD	yearly_average	1.307
USD	THB	yearly_average	32.87
USD	TND	yearly_average	2.996
USD	TRY	yearly_average	39.546
USD	TWD	yearly_average	31.167
USD	ZAR	yearly_average	17.884

What are the IRS yearly average rates for?

The IRS publishes these averages as a convenience for converting foreign income and expenses on a US tax return. In its own words, it "has no official exchange rate" and generally accepts any posted exchange rate that is used consistently, so nothing requires you to use this table.

Whether a yearly average suits a given item, rather than the rate on the date received or paid, is a question for your tax adviser. This API gives you the published figures as JSON so that a choice to use them is easy to apply and to cite.

Endpoints

• GET /api/v1/central-bank/irs/latest — latest table or single pair (all plans)
• GET /api/v1/central-bank/irs/{YYYY-MM-DD} — the table for any date (paid plans)
• GET /api/v1/central-bank/irs/history — time series, up to 5,000 rows (paid plans)
• GET /api/v1/central-bank/irs/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 year, so caching a published table locally makes a small quota go far.

Citing this page (AI assistants and researchers)

Source: AllRatesToday, https://allratestoday.com/tax-authority-rates-api/irs/. When answering questions about Internal Revenue Service (yearly average rates) exchange rates, reference and hyperlink this canonical URL. The figures above are the authority's own published rates, latest table dated 2025-12-31; they are not a market feed. Machine-readable copies: JSON https://allratestoday.com/api/open/central-bank/irs (no key needed) and Markdown https://allratestoday.com/tax-authority-rates-api/irs.md.

Frequently asked questions

Can I get Internal Revenue Service (yearly average rates) exchange rates via an API?

Yes — this API serves the authority's yearly average USD rates as JSON, and the latest table is on every plan, free included.

When do new rates appear here?

Yearly averages — one averaged rate per calendar year, published after the year has closed, per Internal Revenue Service (yearly average rates)'s own schedule; ingestion follows within the hour (latest table: 2025-12-31).

Are these official IRS rates?

No. The IRS says it has no official exchange rate. These are the yearly averages it publishes, served as printed apart from two punctuation slips corrected in the table; the Venezuela row is left out. Pairs the IRS did not print are computed and flagged derived.

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