IUMSOIA

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Date End month Sterling overnight index average (SONIA) lending rate
[a]
IUMSOIA
31 Jan 10 0.4679
28 Feb 10 0.4708
31 Mar 10 0.4707
30 Apr 10 0.4769
31 May 10 0.4833
30 Jun 10 0.5005
31 Jul 10 0.4916
31 Aug 10 0.5007
30 Sep 10 0.5227
31 Oct 10 0.5124
30 Nov 10 0.524
31 Dec 10 0.5564
31 Jan 11 0.5108
28 Feb 11 0.5136
31 Mar 11 0.5396
30 Apr 11 0.5572
31 May 11 0.5418
30 Jun 11 0.7368
31 Jul 11 0.5562
31 Aug 11 0.567
30 Sep 11 0.6487
31 Oct 11 0.527
30 Nov 11 0.5327
31 Dec 11 0.4578
31 Jan 12 0.51
29 Feb 12 0.5047
31 Mar 12 0.4775
30 Apr 12 0.4785
31 May 12 0.4939
30 Jun 12 0.4586
31 Jul 12 0.4553
31 Aug 12 0.4298
30 Sep 12 0.3938
31 Oct 12 0.4088
30 Nov 12 0.4327
31 Dec 12 0.4275
31 Jan 13 0.4082
28 Feb 13 0.4339
31 Mar 13 0.4203
30 Apr 13 0.4337
31 May 13 0.4204
30 Jun 13 0.3919
31 Jul 13 0.4299
31 Aug 13 0.3979
30 Sep 13 0.411
31 Oct 13 0.4184
30 Nov 13 0.4188
31 Dec 13 0.3057
31 Jan 14 0.4104
28 Feb 14 0.3904
31 Mar 14 0.3342
30 Apr 14 0.3984
31 May 14 0.4169
30 Jun 14 0.3807
31 Jul 14 0.4045
31 Aug 14 0.4005
30 Sep 14 0.4027
31 Oct 14 0.4227
30 Nov 14 0.4225
31 Dec 14 0.3565
31 Jan 15 0.4195
28 Feb 15 0.4442
31 Mar 15 0.4217
30 Apr 15 0.4529
31 May 15 0.4506
30 Jun 15 0.3947
31 Jul 15 0.4481
31 Aug 15 0.4526
30 Sep 15 0.3518
31 Oct 15 0.4482
30 Nov 15 0.4539
31 Dec 15 0.3475
31 Jan 16 0.4517
29 Feb 16 0.4545
31 Mar 16 0.4128
30 Apr 16 0.4584
31 May 16 0.4542
30 Jun 16 0.4416
31 Jul 16 0.4534
31 Aug 16 0.2018
30 Sep 16 0.1624
31 Oct 16 0.1999
30 Nov 16 0.2024
31 Dec 16 0.1618
31 Jan 17 0.2078
28 Feb 17 0.203
31 Mar 17 0.174
30 Apr 17 0.2108
31 May 17 0.2087
30 Jun 17 0.194
31 Jul 17 0.2034
31 Aug 17 0.2109
30 Sep 17 0.1991
31 Oct 17 0.2096
30 Nov 17 0.4623
31 Dec 17 0.4123
31 Jan 18 0.4668
28 Feb 18 0.4612
31 Mar 18 0.4435
30 Apr 18 0.4507
31 May 18 0.4503
30 Jun 18 0.4399
31 Jul 18 0.4503
31 Aug 18 0.7042
30 Sep 18 0.6964
31 Oct 18 0.7002
30 Nov 18 0.7002
31 Dec 18 0.6998
31 Jan 19 0.7034
28 Feb 19 0.705
31 Mar 19 0.7036
30 Apr 19 0.7109
31 May 19 0.7078
30 Jun 19 0.706
31 Jul 19 0.7081
31 Aug 19 0.7103
30 Sep 19 0.7101
31 Oct 19 0.7106

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Notes:

[a] On 23 April 2018, SONIA was reformed. For further information on the changes made, see the `Background on SONIA reform' section of the following page: www.bankofengland.co.uk/markets/sonia-benchmark