Further details about write-offs and other revaluations of loans by monetary financial institutions data

Write-offs are changes in the value of an institution’s assets resulting from the institution’s active decisions to revalue claims.

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These cover primarily full or partial write-offs of loans, as well as the value of any discounts when disposing of other assets at a discount to book value. 


Data are available quarterly and annually from 1993 onwards. The full breakdown for National Account sectors is also available from 1993, although two of the splits were initially based on estimates. Data for write-offs of loans secured on dwellings prior to Q3 1997 are estimates, not based on Bank of England statistical forms, and write-offs of loans to unincorporated businesses are based on estimates until Q4 1994, when they began to be collected formally.

The data are not seasonally adjusted. Publication of data will usually occur on the 21st working day of the second month following the quarter end, in Write-offs of loans by monetary financial institutions (excluding central bank (Table C2.1).

Amounts outstanding of monetary financial institutions' loans to compare with write-offs data are also available by sector. Write-off data during a quarter are compared to the amounts outstanding at the end of the previous quarter. As a result, these data include building societies from Dec-2007.


Between 1993 and 1997 the data were sourced quarterly from the Bank of England’s Q1(R) form, and between 1997 and 2007 they were collected quarterly on the QX form. Credit card write-offs were available monthly from the Q1(D) form (which was replaced by the IC form from October 2007 onwards), but were published quarterly along with the other data. 

On the QX form, around 220 banks were required to report their total write-offs to UK residents and non-residents every quarter, and the sectoral breakdown of write-offs to UK residents at the end of every year. Some banks, whose write-offs exceeded a certain threshold, had to report additional quarterly splits. Where banks did not report a quarterly breakdown, their data from the previous year were used to allocate the reported total to the various sectors. The data were then revised at the end of the year when the full split became available.

Since 2008, the data are sourced quarterly from the Bank of England’s WO form. Monthly credit card write-offs are also collected on the IC form and from January 2013, monthly write-offs of secured and other lending to individuals have been collected on the IS and IO forms, respectively. The WO form is reported by any bank or building society making more than £10mn of write-offs over the previous year. The data are not grossed up to account for non-reporting MFIs, because of the irregular nature of write-offs. The institutions that do report the data account for 70% of total lending by UK monetary financial institutions to other UK residents.

Since 2014, the WO form has included a further breakdown of write-offs of loans to private non-financial corporation (PNFCs) into certain industrial classifications, which are consistent with data collected on Form AL. For more details about the industrial breakdown of write-offs, please see the January 2015 Statistics article ‘Improvements to the compilation of M4 lending excluding intermediate OFCs series and the publication of additional Monetary Financial Institutions’ data’.

All data are subject to revision if and when new information becomes available. For more information on revisions practices see further details about revisions.


The data in Table C2.1 relate to lending by UK banks and building societies only, and do not cover loans by other lenders. Prior to 2008, the data only covered write-offs by UK banks.

“Write-offs” do not include provisions against bad debts, or impairment charges, although it is likely that most loans written off will have been provided for previously.

The sectoral breakdown of write-offs is consistent with the definitions used for the Explanatory notes on Sectoral Analysis of M4 and M4 Lending. Within the Individuals category, the “other” category relates to unsecured lending other than credit card lending to individuals, and so mainly involves unsecured personal loans.

The Statistics article 'UK banks’ write-offs of bad debt' explains how write-offs data are used to adjust lending flows.

Valuation and Breaks

Building societies' statistical reporting transitioned from the Financial Services Authority to the Bank of England on 1st January 2008. Write-offs by building societies are therefore included in Table C2.1 from Q1 2008 onwards. Prior to this, Table C2.1 included only write-offs by banks.

Securitisations Reporting

From January 2010 data onwards, all loans that have been securitised by MFIs will be included on the institutions’ balance sheet for statistical reporting purposes. Some institutions reported securitisations on balance sheet prior to 2010, so their reporting did not change. However, other institutions brought back on to their balance sheets loans that had been securitised in the past. When these loans came back on balance sheet, an additional liability to the SPV was also brought on balance sheet, to balance out the increase in loans. This caused a level shift in various series in January 2010, as well as changing the coverage of various series from January 2010 data onwards. For more details, please see the February 2010 Statistics article Statistical reporting of securitisations.

Further information

Improvements to the compilation of M4 lending excluding intermediate OFCs series and the publication of additional Monetary Financial Institutions' data Rajveer Berar and Ross Meader, Statistics article, January 2015
Statistical reporting of securitisations Owladi, J, (2010) Statistics article, February 
Transition of building society statistical reporting, O'Connor, P, (2008) Statistics article, January

This page was last updated 31 January 2023