50 Year SONIA Swap Rate: Current & Historical
The 50 year SONIA swap rate is the annual fixed rate exchanged for annually paid, compounded SONIA over the next 50 years. Check the current rate, its one-year chart and daily history, with downloads straight to Excel.
GBP · 50Y · SONIA
52-wk range
4.21% – 4.96%
Last update:
Recent daily closes
| Date | Rate | Daily change |
|---|---|---|
| Live | – | |
| 24 Jul 2026 | 4.82% | -7 bp |
| 23 Jul 2026 | 4.89% | +3 bp |
| 22 Jul 2026 | 4.86% | -1 bp |
| 21 Jul 2026 | 4.88% | 0 bp |
| 20 Jul 2026 | 4.88% | +8 bp |
| 17 Jul 2026 | 4.80% | -3 bp |
| 16 Jul 2026 | 4.83% | +3 bp |
| 15 Jul 2026 | 4.80% | -1 bp |
| 14 Jul 2026 | 4.81% | -2 bp |
| 13 Jul 2026 | 4.83% | +6 bp |
Rates built from interdealer broker and exchange quotes. Read how we build these rates.
This is yesterday's close
See the live 50 year SONIA swap rate
- Live mids, refreshed every minute
- Full 50 year daily history to Excel
- Every SONIA tenor, 1 to 50 years
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Live 50 year SONIA in Excel & API
If you're on this page more than once a month, you don't need a rate, you need a feed. One function, always-live curves, straight in your model.
// Excel: live SONIA swap rate in a cell =BlueGamma.SWAP_RATE("SONIA", start_date, maturity_date, "1Y") # API: the same rate, one GET away GET api.bluegamma.io/v1/swap_rate ?index=SONIA&start_date=2D&maturity_date=50Y x-api-key: your_api_key
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FAQs
The 50 year SONIA swap rate is the annual fixed interest rate that market participants exchange for annually paid, compounded SONIA over the next 50 years. It is set in the interdealer swap market and moves continuously with expectations for Bank of England policy.
The rate shown on this page is the previous UK business day's close; the live rate is available in the BlueGamma app.
Three common reasons:
- Timing: this page shows the previous UK business day's mid-market close, while banks quote off the live curve, which moves through the day.
- Spread: the mid-market rate is the raw interbank level. A bank's quote adds a credit and execution charge, and on a loan a lending margin on top.
- Conventions: a quote using a different payment frequency or day count will differ slightly from the annual/annual rate shown here.
If you are comparing a quote against the market, compare it with the live mid rate at the time of the quote.
Longer swap rates reflect expectations for Bank of England policy over decades plus a term premium, and they are heavily influenced by structural demand from pension funds and insurers hedging long-dated liabilities.
That demand can compress or even invert the long end of the curve, so very long swap rates sometimes trade below shorter ones.
This page shows the last 12 months of daily closes, the 52-week range and dated lookbacks.
The BlueGamma app carries the full daily history for every SONIA tenor, alongside 20+ other currencies, with downloads straight to Excel.
BlueGamma takes quotes directly from leading inter-dealer brokers and exchanges, bootstraps them into ready-to-use curves, and validates the output for consistency on a regular basis.
The rates shown on this page are the previous UK business day’s close. Live rates, refreshed every minute, are available in the BlueGamma app with a free trial.
More on SONIA
SONIA Swap Rates for All Tenors
The full rates table: every liquid tenor from 1 to 50 years with one-week, one-month and one-year history.
SONIA Forward Curve
The market-implied path for SONIA: live forward curve, charted and downloadable.
Bank of England Rate Forecast
Market-implied probabilities for the next MPC meeting and the Bank Rate path ahead.
Compounded SONIA
Daily and period-compounded SONIA rates for floating-leg calculations.
More from BlueGamma
Or browse the full swap rate catalogue, covering all 86 rates across 33 currencies.