7OCT

ONS raises its June debt estimate by £4.9bn

1 min read

12:52UTC

The ONS lifted its end-June net debt estimate to £2,994.8bn on 21 August, blaming Bank of England data that arrives a month late.

← Back to £8.1bn over forecast, and the 30-year at 6%Jump to analysis ↓

EconomicDeveloping

Key takeaway

June's debt estimate rose by £4.9bn; May's had been cut by £8.3bn.

The Office for National Statistics (ONS) raised its estimate of net debt at the end of June 2026 by £4.9bn, or 0.2%, to £2,994.8bn, in the revisions section of its 21 August bulletin⁠¹. It attributes the change largely to updated Bank of England data, which reaches the statisticians with a one-month lag, and it notes that revisions of this size are not uncommon. That answers a question this desk left open last month against a June reading of £2,989.9bn.

The end-May estimate was cut by £8.3bn through the identical mechanism, and the end-June estimate has now been lifted by £4.9bn. Same cause, opposite directions, ten weeks apart. No single bulletin says so, because seeing it means holding two months' revisions sections side by side.

Bank of England data reaches the ONS roughly four weeks late, so each correction lands in a revisions section that nobody reports. The number a newspaper headline quotes on release day is one the statisticians themselves expect to move, and the lesson a reader takes from that is small and permanent: a first estimate of the national debt has not settled.

Deep Analysis

In plain English

When the ONS first reports how much the country owes for a given month, it is working with data that is not yet complete, so it labels the number provisional. A few weeks later, once more detailed figures come in from the Bank of England, it revises that number. This month the revision went up: end-June debt is now put at £2,994.8bn, £4.9bn higher than first reported. In May, the same kind of update went the other way and made the number smaller. Neither revision means the government borrowed differently; it means the earlier estimate was based on incomplete information.

Deep Analysis

Root Causes

Monthly net debt is a provisional estimate at first release, built substantially from Bank of England data on the government's cash position and gilt holdings that itself gets revised as fuller source data arrives a month or more later. ONS names updated Bank of England data as the driver of this £4.9bn (0.2%) upward revision to end-June, the same lag mechanism that cut the end-May estimate by £8.3bn in the opposite direction (per this desk's fact-discipline register).

The structural cause is a publication trade-off: ONS releases debt figures roughly three weeks after month-end to keep the series timely, before every contributing dataset is final. Later vintages of the same month are more accurate but arrive only as next month's bulletin revises them, which is why any single month's headline figure should be read as provisional until at least one revision cycle has passed.

What could happen next?

Precedent
First estimates of monthly net debt have moved by billions in both directions this year (down £8.3bn for May, up £4.9bn for June), so any single month's headline figure should be read as provisional until at least one revision cycle has passed.

Sources:Office for National Statistics

Mentions:Office for National Statistics →Bank of England →England →

First Reported In

Update #3 · Debt ratio fell; borrowing missed by £2.3bn

Office for National Statistics· 3 Sept 2026

Read original →

Causes and effects

Caused by

Britain owes 95p for every £1 it makes

Revises the end-June 2026 net debt figure this desk published last month.

Occurred 20 Jul 2026

Read story →

This Event

ONS raises its June debt estimate by £4.9bn

A first estimate of the national debt moves by billions in either direction before it can be treated as settled.

Led to

ONS puts borrowing £8.1bn over OBR path

Upward revisions to net debt in July's release continued in August's, with April to July borrowing revised up £2.3bn.

Occurred 22 Sept 2026

Read story →

Different Perspectives

Conservative Party

Leader Kemi Badenoch said Labour will run out of money and proposed lifting defence to 3% of GDP, paid for from welfare. Shadow work and pensions secretary Helen Whately put those savings at £23bn, "just the start".

Reform UK

Treasury spokesman Robert Jenrick pledged £80bn a year of spending cuts by the end of the next parliament and claimed £30bn a year of interest savings. The Spectator judged that the sums still do not fully add up.

Centre for Policy Studies

The right-of-centre think tank argued on 4 October that Britain is not a low-tax country once workplace pensions and student-loan repayments are counted. Its comparison rests on 2019 data.

Institute of Economic Affairs

The free-market think tank argued on 28 September that alcohol, tobacco and landfill duties raised £5.2bn less than the OBR projected. That comparison is separate from the five-month borrowing overshoot.

Resolution Foundation

The centre-left think tank said on 8 September that about £1 in every £12 of public spending now goes on debt interest. In July it put headroom against the fiscal rules at about £10bn.

Audit Scotland

It reported on 17 September that three Scottish budgets planned ScotWind drawdowns and drew nothing each time. It warned that using one-off receipts to balance annual budgets can weaken spending control.