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SONIA rates

The FCA advises all GBP Libor users to transition to Sonia by the end of 2021.

Unlike Libor, Sonia only comes with one tenor: it measures the overnight cost of borrowing by taking an average of the previous day’s transactions.

In order to calculate floating interest rates for a multi-day period (e.g. a 3 month interest period on a loan or interest rate swap), each daily fixing of Sonia over that period must be compounded into a single rate. This compound rate can therefore be calculated on the last day of the interest period. The table below shows the compound Sonia rates for a range of different interest period lengths, with end dates as shown in the first column.

Data is refreshed on a daily basis, at 11am.

Compounded Sonia Rates

End Date ON 1M 3M 6M 12M
12/11/2019 0.7112% 0.7110% 0.7111% 0.7109% 0.7100%
11/11/2019 0.7100% 0.7110% 0.7111% 0.7109% 0.7100%
08/11/2019 0.7108% 0.7111% 0.7111% 0.7109% 0.7099%
07/11/2019 0.7115% 0.7111% 0.7111% 0.7109% 0.7099%
06/11/2019 0.7105% 0.7111% 0.7110% 0.7109% 0.7099%
05/11/2019 0.7117% 0.7111% 0.7110% 0.7109% 0.7098%
04/11/2019 0.7119% 0.7111% 0.7110% 0.7109% 0.7098%
01/11/2019 0.7106% 0.7110% 0.7109% 0.7108% 0.7097%
31/10/2019 0.7107% 0.7110% 0.7108% 0.7109% 0.7097%
30/10/2019 0.7107% 0.7110% 0.7108% 0.7108% 0.7097%
29/10/2019 0.7106% 0.7109% 0.7108% 0.7108% 0.7096%
28/10/2019 0.7097% 0.7109% 0.7108% 0.7108% 0.7096%
25/10/2019 0.7108% 0.7111% 0.7108% 0.7108% 0.7095%
24/10/2019 0.7124% 0.7110% 0.7108% 0.7108% 0.7095%
23/10/2019 0.7116% 0.7110% 0.7107% 0.7108% 0.7095%
22/10/2019 0.7111% 0.7109% 0.7107% 0.7108% 0.7095%
21/10/2019 0.7101% 0.7109% 0.7107% 0.7108% 0.7094%
18/10/2019 0.7107% 0.7108% 0.7107% 0.7108% 0.7093%
17/10/2019 0.7109% 0.7108% 0.7106% 0.7107% 0.7093%
16/10/2019 0.7111% 0.7108% 0.7106% 0.7107% 0.7093%

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