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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
08/07/2020 0.0590% 0.0629% 0.0655% 0.2967% 0.5057%
07/07/2020 0.0592% 0.0630% 0.0656% 0.3003% 0.5069%
06/07/2020 0.0608% 0.0632% 0.0657% 0.3038% 0.5082%
03/07/2020 0.0608% 0.0643% 0.0658% 0.3146% 0.5146%
02/07/2020 0.0611% 0.0645% 0.0659% 0.3182% 0.5164%
01/07/2020 0.0603% 0.0647% 0.0660% 0.3196% 0.5182%
30/06/2020 0.0619% 0.0651% 0.0662% 0.3274% 0.5210%
29/06/2020 0.0633% 0.0653% 0.0662% 0.3289% 0.5222%
26/06/2020 0.0630% 0.0657% 0.0665% 0.3396% 0.5270%
25/06/2020 0.0626% 0.0658% 0.0667% 0.3411% 0.5288%
24/06/2020 0.0621% 0.0659% 0.0668% 0.3487% 0.5306%
23/06/2020 0.0636% 0.0660% 0.0669% 0.3522% 0.5319%
22/06/2020 0.0637% 0.0664% 0.0669% 0.3538% 0.5331%
19/06/2020 0.0624% 0.0668% 0.0687% 0.3664% 0.5394%
18/06/2020 0.0636% 0.0670% 0.0704% 0.3699% 0.5412%
17/06/2020 0.0627% 0.0671% 0.0720% 0.3735% 0.5430%
16/06/2020 0.0634% 0.0673% 0.0736% 0.3770% 0.5443%
15/06/2020 0.0651% 0.0674% 0.0737% 0.3787% 0.5456%
12/06/2020 0.0651% 0.0677% 0.0799% 0.3912% 0.5518%
11/06/2020 0.0657% 0.0677% 0.0815% 0.3947% 0.5536%

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