Box sets » Public spending » Debt interest spending
Government debt liabilities can be valued in various ways. In recent years market and face values have diverged sharply reaching 15% of GDP. In this box we explained why this has happened and why we use face value in our analysis.
The yields on government debt have declined over recent decades. This box described a stylised model that provides a framework to explain the drivers of these changes.
Past pandemics have had long-run impacts on real interest rates. A recent paper found that 20 years after a pandemic real rates fell by, on average, 1.5 percentage points (though less in the UK). This box examined the evidence for the current pandemic and suggested why this time it may be different.
The Asset Purchase Facility (APF) houses the assets purchased by the Bank of England as part of its programme of quantitative easing. This box explained how this lowered interest rates benefitting the Treasury by £113 billion to date but it also increased the sensitivity of interest payments to future rate rises. The box showed how the cash flows to and from the APF change under various scenarios.
The average maturity of UK government bonds is longer than the average maturity of government debt in most other advanced economies. But the average maturity of the net debt of the public sector as a whole (including the Bank of England) has shortened considerably since the global financial crisis. In this box, we explored how the Bank of England's quantitative easing operations have shortened the maturity of public sector net debt, dramatically increasing the sensitivity of debt interest spending to changes in short-term interest rates.
Despite debt rising as a share of GDP to a new post-war peak in our November 2020 forecast, government spending on debt interest was expected to fall to a new historic low as a share of total government revenue. This box explored how this had left the public finances more sensitive to future changes in the cost of servicing this higher debt burden.
By issuing gilts linked to the Retail Prices Index (RPI) the Government exposes itself to inflation risks on interest payments. In this box, we looked at how changes to the formula for calculating RPI would affect our forecast.
In February 2017, just ahead of the Spring Budget and our March Economic and fiscal outlook, the Ministry of Justice announced that the ‘personal injury discount rate’ would be reduced from 2.5 to minus 0.75 per cent (in inflation-adjusted real terms). This box explained the direct and indirect effects of this change on our receipts and public spending forecasts.
Since our March 2014 Economic and fiscal outlook, our debt interest spending forecast was revised down significantly as market expectations of the interest rates at which the Government can borrow and service its debt moved progressively lower and as inflation fell. This box explained some possible factors that could have caused market expectations of interest rates to rise and the effect on the fiscal position of a sudden increase in interest rates.
Our March 2015 Economic and fiscal outlook forecast highlighted large changes in our debt interest forecast since previous fiscal events and the added complexity that debt interest was expressed net of the effect of gilts held by the Bank of England Asset Purchase Facility (APF) associated with past quantitative easing. This box described how we produced the debt interest forecast and illustrated some of the sensitivities to which it was subject.
This box set out the impact of changes in interest rates on our public finances forecast, including debt interest spending and income tax receipts. Updated versions of our ready reckoners can be found on our website.