The ombudsman today launched a consultation, which included proposals to increase the current levy of £70 million to £86 million by 2026/27.

The FOS is also consulting on raising its case fee from £650 to £680, in line with inflation.

The ombudsman also expects to handle more complaints in 2026/27 for banking and consumer credit – the category that includes mortgage grievances.

The FOS today said it expects to see 79,900 complaints in the ‘other banking and consumer credit’ group in 2026/27, a rise of 1.8% from the 78,500 it is currently handling for 2025/26.

The FOS did not break down how many specific mortgage complaints it expects to see, or how many relate to brokers or lenders.

Last month the FOS reported that residential first charge mortgages and buy-to-let (BTL) mortgage complaints both increased by 27% between July and September this year.