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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
08/04/2020 0.0661% 0.1546% 0.5277% 0.6204% 0.6666%
07/04/2020 0.0657% 0.1577% 0.5348% 0.6239% 0.6682%
06/04/2020 0.0640% 0.2140% 0.5419% 0.6270% 0.6699%
03/04/2020 0.0653% 0.2765% 0.5633% 0.6381% 0.6754%
02/04/2020 0.0712% 0.2972% 0.5704% 0.6416% 0.6772%
01/04/2020 0.0729% 0.3048% 0.5759% 0.6451% 0.6789%
31/03/2020 0.0714% 0.3500% 0.5844% 0.6486% 0.6808%
30/03/2020 0.0710% 0.3590% 0.5915% 0.6518% 0.6825%
27/03/2020 0.0729% 0.4009% 0.6126% 0.6624% 0.6876%
26/03/2020 0.0750% 0.4230% 0.6185% 0.6659% 0.6894%
25/03/2020 0.0736% 0.4449% 0.6247% 0.6694% 0.6911%
24/03/2020 0.0723% 0.4669% 0.6335% 0.6729% 0.6928%
23/03/2020 0.0706% 0.4809% 0.6406% 0.6764% 0.6945%
20/03/2020 0.2134% 0.5552% 0.6617% 0.6870% 0.6998%
19/03/2020 0.2148% 0.5723% 0.6672% 0.6897% 0.7012%
18/03/2020 0.2135% 0.5894% 0.6726% 0.6925% 0.7025%
17/03/2020 0.2096% 0.6065% 0.6781% 0.6952% 0.7039%
16/03/2020 0.2093% 0.6207% 0.6836% 0.6980% 0.7052%
13/03/2020 0.2093% 0.6756% 0.7002% 0.7062% 0.7093%
12/03/2020 0.2092% 0.6929% 0.7057% 0.7090% 0.7107%

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