In August, the UK's public sector net borrowing reached 18.3 billion pounds, an increase of 2.9 billion pounds from the same period last year, representing a growth of 19%. This figure is also 3.5 billion pounds higher than what was predicted by the Office for Budget Responsibility. Data released by the Office for National Statistics on September 22 showed that the cumulative borrowing for the fiscal year from April to August amounted to 77.3 billion pounds, which is 2.2 billion pounds less than in the same period last year, but still 8.1 billion pounds higher than official forecasts.
These numbers seem contradictory: the monthly deficit is increasing, yet the annual cumulative figure shows improvement compared to the same period last year; the debt amount continues to rise, but the proportion of debt to GDP has decreased. To understand these figures, it is necessary to separate the monthly data, the annual cumulative figures, and the balance sheet. Taking any one indicator alone can lead to an overly optimistic or pessimistic assessment of the fiscal situation.
Expenditure growth exceeded income, making August the second-highest month-on-month borrowing figure on record.
The £18.3 billion in borrowing in August was the second-highest for August since comparable monthly records began in 1993, only behind 2020, and this ranking does not take inflation into account. Borrowing represents the difference between public sector spending and taxes and other revenues. The central government's net borrowing was £13.3 billion, which is £1.6 billion more than in the same period last year; local government's net borrowing was £4.5 billion, an increase of £1.5 billion year-on-year, and this is a significant source of the deterioration in a single month.
Tax revenue has not failed to grow. The total income from self-assessed income tax in July and August amounted to 18.6 billion pounds, an increase of 1.9 billion pounds compared to the same period last year. However, expenditures on public services, welfare, interest, etc., have grown even faster, and the improvement in revenue has not been able to stop the expansion of the deficit. Inflation can not only drive up nominal tax revenue but also increase expenditures through wage and welfare indexing as well as procurement costs. Therefore, a rise in nominal revenue should not be directly interpreted as an expansion of fiscal space.
From April to August, a total of £77.3 billion was borrowed, which is equivalent to 2.5% of GDP. This figure is 0.2 percentage points lower than the same period last year and ranks as the tenth lowest since 1993. This indicates that the annual cumulative situation is better than last year, but it is still 8.1 billion pounds higher than the target set by the Budget Responsibility Office. The constraints faced by fiscal policy include not only the year-on-year comparison but also whether there is a deviation from the benchmarks set in the budget.
The regular budget deficit for daily activities amounted to 12.4 billion pounds in August, with a cumulative figure of 51.9 billion pounds for the fiscal year, which is 2.9 billion pounds less than the same period last year but 4.8 billion pounds higher than official forecasts. The net cash requirement for the central government was 10 billion pounds, 1.1 billion pounds less than the same period last year and also 2 billion pounds lower than predictions. Cash requirements are not the same as borrowing measured by the national accounts, and one figure cannot replace the other.
Debt of nearly 3 trillion pounds and a debt ratio of 93.8% represent two different types of pressure.
At the end of August, the initial net debt of the public sector was 298.55 billion pounds, an increase of 78.5 billion pounds from a year ago. The proportion accounted for by GDP was 93.8%, a decrease of 1.3 percentage points year-on-year, and it was also 0.8 percentage points lower than the forecast of the Office for Budget Responsibility. The decline in the debt ratio is mainly due to the nominal GDP growing faster than the net debt, which does not mean that the government actually owes less money.
The nominal GDP is affected by both actual growth and price changes. High inflation can mechanically expand the denominator, leading to a decrease in the debt ratio, but it may also increase the interest rates on index-linked government bonds and government spending. To assess sustainability, one must consider interest costs, debt duration, refinancing rates, and income growth, rather than just looking at one ratio.
The broader definition of the public sector's net financial liabilities amounts to 262.04 billion pounds, accounting for GDP 82.3%, an increase of 0.2 percentage points year-on-year. This figure includes a number of financial assets and liabilities in addition to net debt; since the value of these additional assets exceeds that of the additional liabilities, this ratio is 11.5 percentage points lower than that of net debt. The UK fiscal rules adopt this broader measurement, but it contains data that is updated on a quarterly or annual basis, so monthly changes should be interpreted with caution.
This release also includes a major annual update. The statistical office will retrospectively revise some estimates back to the 2013 fiscal year, reducing net debt by 2.9 billion pounds and net financial liabilities by 40.7 billion pounds as of the end of July. The revisions are due to updates in pension, central bank, local government, and other balance sheet data. The figures for the most recent month are also provisional and may continue to change in the future.
For the market, the most critical signals are twofold: the cumulative fiscal year is still better than last year, but the improvement is not sufficient to meet official forecasts; although the debt ratio has decreased, the total debt and monthly borrowing levels remain high. Interest rates and economic growth will determine future financing pressures, while expenditure control and tax performance will determine whether the gap can narrow. The next set of data is scheduled to be released on October 21st. Before that time, claiming that the monthly figure of 18.3 billion pounds represents a complete deterioration in fiscal trends, or suggesting that a decrease of 93.8% indicates a relief in debt issues, would both be conclusions that go beyond what the data supports.
The bond market also compares the demand for issuance with the cost of financing. If investors demand higher yields, the additional borrowing will gradually translate into higher interest expenses; if inflation declines and nominal growth slows down, the advantage of the denominator in the debt ratio may also weaken. Therefore, fiscal data is not an isolated accounting result but interacts with central bank policies, wage levels, and growth expectations. When observing subsequent months, it is important to track both forecast deviations and the extent of historical revisions.
For the average reader, the simplest way to distinguish between them is as follows: borrowing represents a new shortfall that occurs over a certain period of time, debt is an accumulated stock over many years, and the debt ratio compares this stock with the economic scale. The three can move in different directions in the short term. Only when there is a continuous improvement in monthly figures, budget forecasts, and financing costs can it truly indicate that fiscal pressure has been alleviated.
