Chancellor Rachel Reeves has indicated that British taxpayers may face further tax increases to finance a significant rise in defence expenditure, according to reports of intense Whitehall negotiations. The warning comes as Prime Minister Keir Starmer prepares to publish the Defence Investment Plan, with the Treasury resisting the scale of proposed spending and internal disputes over funding.

The £75 billion tax burden and counting

In less than two years, Reeves has implemented measures yielding an extra £75 billion annually, making her the most prolific tax-raising Chancellor in six decades, surpassing Gordon Brown's £62.1 billion cumulative increases, as the report notes. The Office for Budget Responsibility forecasts that the tax burden will peak at 38.5 percent of GDP by 2030-31, up from earlier projections. already, Reeves has elevated the tax burden to unprecedented levels, and there are worries that further leftward policy shifts by Labour could trigger additional spending and higher borrowing costs.

Why a 1% capital raid on schools and hospitals is not enough

Departments have been asked to contribute an average of one percent of their capital budgets to generate approximately £6 billion toward the plan, a move that could divert funds from school and hospital construction as well as postpone transportation infrastructure initiatives. However, the Chancellor has indicated that such internal reallocation will be insufficient, according to the article . Speaking at a City conference,Reeves stated that her Budget's 'headroom' cannot accommodate all the additional spending, emphasizing that 'the money has to come from somewhere and borrowing cannot always be the answer.'

The Treasury's win: Defence spending cut from £18bn to £15bn

The forthcoming announcement is expected to include defence spending increases of around £15 billion, a figure negotiated down from an initial £18 billion request by the Treasury, the report says. This multi-billion pound gap in existing defence budgets compounds the challenge, alongside disputes over the timeline and methodology for meeting spending targets. Prime Minister Keir Starmer is keen to publish the long-awaited Defence Investment Plan soon, reportedly tomorrow, but the Treasury is said to be resisting the scale of spending proposed.

A narrow tax base and the 'stealth raid' risk

The OBR has warned that the government's revenue relies heavily on a narrow base of high-income earners, and the 'stealth raid' through frozen tax thresholds remains highly vulnerable to inflation and wage growth fluctuations, the article notes. These dynamics underscore the difficult trade-offs between defence expansion, public services funding, and tax policy as the administration grapples with constrained resources and competing priorities. Amid these fiscal pressures, a developing 'bidding war' among potential successors to Starmer is evident.

What remains unclear is how the government will bridge the remaining gap without either breaking its fiscal rules or imposing deeper cuts on other departments. The source does not specify whether Reeves has ruled out borrowing beyond current plans, nor does it detail which taxes might rise—leaving businesses and households in suspense. Additionally, the extent of the welfare reforms that Labour MPs have rejected is not fully explained, making it hard to assess the full scope of the fiscal trade-offs.