SONIA Rate Today: Overnight Fixing & History
The Sterling Overnight Index Average (SONIA), published each London business day by the Bank of England — today’s fixing, the day-over-day move, and the daily history.
GBP · O/N · SONIA
52-wk range
3.72% – 4.22%
Last update:
SONIA Fixing Chart (1 Year)
The SONIA fixing is 3.73130%, as of , down 0.03bp on the previous publication day.
| Date | SONIA fixing |
|---|---|
| 29 Jul 2026 | 3.73130% |
| 28 Jul 2026 | 3.73160% |
| 27 Jul 2026 | 3.73120% |
| 24 Jul 2026 | 3.73070% |
| 23 Jul 2026 | 3.73100% |
| 22 Jul 2026 | 3.73030% |
| 21 Jul 2026 | 3.73020% |
| 20 Jul 2026 | 3.73070% |
| 17 Jul 2026 | 3.73070% |
| 16 Jul 2026 | 3.73080% |
| 15 Jul 2026 | 3.73080% |
| 14 Jul 2026 | 3.73110% |
| 13 Jul 2026 | 3.73080% |
| 10 Jul 2026 | 3.73100% |
| 09 Jul 2026 | 3.73110% |
SONIA is administered and published by the Bank of England at 09:00 London time on the business day after the transactions it reflects.
Beyond today's print
See where SONIA is heading
- Market-implied SONIA forward path
- Full daily fixing history
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“I do debt service forecasting for any of the facilities where we have floating rate exposure… I like this option to just pull the forward curve monthly or quarterly going out.”
That's today's fixing. See where it's heading.
Today's fixing tells you what overnight GBP costs now. Forward rates imply the path of future fixings: what the market expects SONIA to be at each future date, straight from today's swap pricing.
See the SONIA forward curveThe fixing prices one night. A swap prices years of them.
A swap rate is every future SONIA fixing, compounded and quoted as one fixed number per tenor. Before a desk quotes you theirs, check it against an independent GBP mid — the difference is their margin.
Daily SONIA fixings in Excel & API
If you're rebuilding this table in a spreadsheet every month-end, you don't need a rate, you need a feed. One function, official fixings, straight into your accrual model.
// Excel: any day's SONIA fixing in a cell =BlueGamma.FIXING("SONIA", accrual_date) # API: the same rate, one GET away GET api.bluegamma.io/v1/fixing ?index=SONIA&valuation_date=YYYY-MM-DD x-api-key: your_api_key
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FAQs
The latest SONIA fixing, with its publication date and day-over-day change, is shown at the top of the table above. SONIA is published by the Bank of England at 09:00 London time on the following business day.
The Bank of England administers SONIA. Each London business day at 09:00, it publishes the fixing for the previous business day, based on actual overnight unsecured sterling transactions.
No. The SONIA fixing is a single overnight rate. Compounded SONIA accrues those daily fixings over an interest period (1, 3, 6 or 12 months). For period rates, see our daily compounded SONIA page.
The BlueGamma Excel Add-in and API serve SONIA fixings for any date, plus the full history — the same feed behind this page. A 14-day trial includes both.
Related SONIA resources
Compounded SONIA rates
Daily 1M, 3M, 6M and 12M compounded SONIA, calculated in arrears from these fixings.
SONIA forward curve
The market-implied path of future SONIA fixings, from live GBP swap pricing.
GBP swap rates
Live SONIA swap rates across tenors from 1 to 30 years.