New figures reveal 3% increase in workload for first six months of 2016.
The Financial Ombudsman Service took on 169,132 new cases in the first half of 2016, an increase of 3% on the second half of 2015.
The figures, released by the Ombudsman in its six-monthly review, showed that payment protection insurance (PPI) made up 54% of new complaints.
PPI complaints totalled 91,381 new cases, a slight fall from 92,667 at the end of last year.
The FOS stated that one of the reasons for rise was that payday lending complaints more than doubled when compared to the last six months of 2015.
The Parliament-backed organisation also publicised which firms generated the most complaints in general insurance excluding PPI.
However it noted that the number was likely to reflect the size of the business involved.
UK Insurance, part of Direct Line Group, topped the complaints table. Aviva, Ageas, Axa and Admiral made up the top five.
Chief ombudsman Caroline Wayman said: “The data we have published about complaints over the last decade or so helps to illustrates a challenging and volatile period for financial businesses. But the current signs are that complaints are now broadly levelling off and moving onto a more even keel.
“Although it’s a few years now since PPI complaints peaked, we have been receiving over 3,000 a week for six years running – despite wider expectations that numbers will fall. And we’re continuing to deal with the issues and uncertainties around PPI which remain a significant challenge for everyone involved.”
She concluded: “Lots of factors can influence the complaints we see, from more people knowing about their rights when things go wrong to external factors like volatility in the stock market or extreme weather conditions. That’s why I believe it’s important that we continue to share our insights into complaints to help businesses to avoid the mistakes of the past.”