SONIA rates in 2018 Historical SONIA interest rates for the year 2018

This page shows a summary of the historic SONIA (Sterling Overnight Index Average) interest rates for 2018. The first table below shows the first, last, highest, lowest and average SONIA interest rate for the year 2018. If you look further down the page, you can find more information about the development of the SONIA interest rates over 2018.

Check the current SONIA interest rates

SONIA 2018
First
Last
Highest
Lowest
Average
SONIA
0.4622 %
0.6998 %
0.7060 %
0.4399 %
0.5595 %

SONIA interest rates are administered and published by The Bank of England. The Bank of England publishes SONIA data under Open Government Licence (nationalarchives.gov.uk). Use of the data is at your own risk.

Additional information

You will find a chart and a table below with additional information about the development of the SONIA interest rates for each month in 2018.

SONIA Chart 2018

Historical SONIA rates in 2018
SONIA in 2018 - per month
First
Last
Highest
Lowest
Average
January
0.4622 %
0.4668 %
0.4680 %
0.4605 %
0.4631 %
February
0.4636 %
0.4612 %
0.4668 %
0.4612 %
0.4634 %
March
0.4646 %
0.4435 %
0.4680 %
0.4435 %
0.4637 %
April
0.4652 %
0.4507 %
0.4670 %
0.4507 %
0.4617 %
May
0.4497 %
0.4503 %
0.4556 %
0.4497 %
0.4529 %
June
0.4544 %
0.4399 %
0.4544 %
0.4399 %
0.4507 %
July
0.4531 %
0.4503 %
0.4580 %
0.4503 %
0.4545 %
August
0.4522 %
0.7042 %
0.7058 %
0.4522 %
0.6911 %
September
0.7020 %
0.6964 %
0.7046 %
0.6964 %
0.7012 %
October
0.7021 %
0.7002 %
0.7026 %
0.6988 %
0.7011 %
November
0.7006 %
0.7002 %
0.7032 %
0.7002 %
0.7017 %
December
0.7019 %
0.6998 %
0.7060 %
0.6998 %
0.7026 %