The ONS figures showed that interest payments on government debt hit £9.1bn last month, the highest October figure since monthly records began in 1997.
Borrowing in the financial year to October has now reached £96.6bn, which is £1.1bn more than at the same point last year.
Last month’s Budget is set to increase government spending by almost £70bn a year over the next five years, according to the Office for Budget Responsibility,, external with half funded through higher taxes and the rest coming through higher borrowing.
The ONS figures showed that government spending on pay was up £2.2bn from a year earlier, reflecting some the impact of the latest public sector pay deals.
When Labour came to power it announced above-inflation backdated pay increases for NHS staff and teachers.
Chief Secretary to the Treasury Darren Jones said again that the Labour government had inherited a difficult economic situation following the General Election.
“At the Budget we addressed this, fixing the foundations and putting public finances on a sustainable footing to rebuild the country,” he said.
“This government will never play fast and loose with the public finances. Our new robust fiscal rules will deliver stability by getting debt down while prioritising investment to deliver growth.”
Capital Economics’ Mr Kerr said that October’s borrowing figures “underline the little wiggle room the chancellor has to significantly increase day-to-day spending”.
“While the chancellor has downplayed the chances of further tax-raising measures, if she wants to increase day-to-day spending in future years, she may need to raise taxes to pay for it,” he said, referring to chancellor’s self-imposed targets.
The ONS said that public debt – the total amount of money owed by the government that has built up over years – had reached £2.7 trillion.
This amount is 97.5% of the size of the UK’s economy as measured by gross domestic product (GDP), and remains at levels last seen in the early 1960s.