Early thoughts on a Burnham premiership

With the very high likelihood that Andy Burnham could be installed as Prime Minister before September, attention is beginning to turn to the likely implications for financial and investment planning. While any change in leadership would be politically significant, it would not alter the underlying fiscal constraints facing the next administration.

The immediate challenge is straightforward. Burnham would inherit a Treasury with very limited room for manoeuvre, at a time when public borrowing remains elevated and market scrutiny is intensifying. As reported by the Financial Times, UK borrowing reached £23.3 billion in May, driven in large part by higher debt interest costs. That matters not only for public finances, but also for political credibility. Any incoming Prime Minister will be judged quickly on whether markets believe fiscal discipline will be maintained.

This is why the bond market may prove to be one of the earliest and most important tests of a Burnham premiership. Reports in the Daily Telegraph suggest banks are already warning that a Burnham government could imply higher borrowing, greater pressure on fiscal rules and, in turn, higher UK borrowing costs. Whether or not that view proves accurate, the point is that investor confidence may become an immediate constraint on policymaking.

Source: MoneyWeek

Against that backdrop, the first Budget, likely in November and potentially presented by a newly appointed Chancellor, will be especially important. It is likely to offer the clearest early signal of Burnham’s policy instincts across personal taxation, property, business taxation, mortgages and pensions. Although much remains uncertain, there are already some indications from previous speeches and interviews. One area to watch is the possible introduction of a land value tax. This has at times been discussed as a possible replacement for council tax, business rates and stamp duty. If pursued seriously, such a reform would represent a significant shift in the taxation of property and land.

Inheritance Tax is another area where Burnham has previously indicated a willingness to think differently. He has suggested abolishing Inheritance Tax in its current form and replacing it with a levy linked to funding social care in old age. In 2023, he said: “I would abolish inheritance tax in its current form but replace it with a care levy which everybody would pay – but obviously the wealthiest would pay the most.” More recently, during his by-election campaign, he returned to the same theme, saying: “I’ve long believed we should have a different way for paying for care.”

There may also be renewed debate over the top rate of income tax. The additional rate currently stands at 45 per cent, but a move back to 50 per cent for higher earners would have obvious political appeal. The economic case, however, is less clear cut. Dan Neidle of Tax Policy Associates has noted that “many taxpayers would likely treat such a rise as temporary and respond accordingly, limiting the revenue gain and potentially reducing receipts in the short to medium term.” In practice, the effectiveness of any such measure would depend heavily on whether it was seen as durable.

The broader conclusion is that a Burnham premiership, if it materialises, is likely to begin under severe fiscal and market pressure. That makes tax policy one of the most likely areas for early action, but also one of the areas where political ambition will collide most directly with economic reality. For investors and advisers, the key issue will not simply be which policies are announced, but whether they are judged credible by markets.

First published by LGT Wealth Management June 2026