Rearmament's Hidden Bill: Capital, Tax and Debt

The decisive question in the Western rearmament drive is no longer whether NATO members have promised higher military spending. It is who loses access to the public capital, tax capacity and borrowing room used to finance it. The October 28 British budget supplied an unusually clear example: the government said it would fill a £4.7 billion gap in its Defence Investment Plan partly by reducing capital allocations elsewhere. Germany has chosen a much larger debt-financed route, while Italy has sought to slow planned defence increases under pressure from borrowing costs. Canada is pursuing a different mix of procurement and fiscal commitments. The official percentages are common, but the bills are not. A defence target described as a share of GDP is a political destination, not a supplier invoice or a paid-for military capability.

NATO's Hague agreement calls for members to devote five percent of GDP to defence and security-related investment by 2035, consisting of at least 3.5 percent for core defence and up to 1.5 percent for broader security-related purposes. This distinction matters for every argument about sacrifice. A government cannot honestly compare a public hospital budget with the whole five percent as if every euro were being spent on rifles and tanks. Conversely, classifying civilian resilience and infrastructure as security cannot remove their opportunity cost. The alliance's definition includes related investments with recognised security functions. Analysts must ask whether the additional money purchases new capacity, repairs a backlog or merely changes which budget heading holds existing activity. The public should see all three columns separately.

This week delivered three important news signals. First, Britain's October 28 budget explicitly identified a Defence Investment Plan funding gap and capital transfers to close it. Second, the same budget created a financing task force and announced efforts toward a multinational investment mechanism with European allies, shifting part of the discussion from direct taxes to new financial structures. Third, the Institute for Fiscal Studies warned, as reported on October 28, that the budget offered insufficient detail on how the UK would get to the three-percent stage by 2030. Alongside those developments, the political debate continued over how much eastern allies should pay for immediate deterrence and how much western states should prioritise their welfare systems. These events do not establish a completed financing answer. They identify where governments are trying to defer choices.

The British arithmetic starts with a precise distinction between available cash and a long-term target. The Chancellor's budget speech and the official budget document say the government will fully fund its current Defence Investment Plan, with the detailed route to 3.5 percent by 2035 deferred to next year's spending review. Reuters reported that the £4.7 billion shortfall would be addressed through approximately £3 billion from a one-percent reduction in departmental capital budgets over 2027-28 to 2029-30 and £1.7 billion from a Treasury reserve. A cut to a capital budget is not the same as a recurring reduction in nursing pay or a cancelled pension entitlement. But it can delay hospital buildings, transport upgrades, housing projects or other public investments if their departments lack alternatives. The exact displaced projects should be disclosed before asserting a specific victim.

The British case also shows why political claims of private finance deserve forensic scrutiny. A government can create a task force, guarantee a loan or enable a development bank without immediately spending the full face value of future projects. Yet a guarantee creates a contingent liability: taxpayers may bear losses if a partner fails. Private investors require some combination of profit, security or public support. Those returns are not free money. Public-private structures can accelerate factory construction or joint procurement when designed well, but may cost more if the state carries the downside while investors retain a priority claim on earnings. Procurement contracts should state who bears construction overruns, which party owns the resulting asset and what compensation is due if the military changes specifications.

The UK's plan also explicitly aims to stimulate domestic production. This is a genuine potential economic gain: shipyards, electronics suppliers, apprenticeships and dual-use technology firms may gain contracts and investment. It is not automatically a net gain to the national budget. Workers moved from productive civilian construction to defence projects may ease one bottleneck while worsening another. Domestic contracts retain more of the spending in local wages and tax receipts than imports do, but they can also be more expensive or slower. A fair evaluation compares a completed capability's availability, price and lifespan with competing offers. Defence employment should not be counted as a benefit without accounting for labour shortages and productivity elsewhere. Nor should every foreign purchase be described as a waste if interoperability and delivery speed improve.

Germany faces a different problem: how much debt capacity can be committed to military readiness while existing social obligations remain politically sensitive. The federal finance ministry's 2027 draft projected defence ministry spending of €109.7 billion, with additional resources from the Bundeswehr special fund. The government linked this to a path toward 3.5 percent of GDP for core defence by 2029. Parliament's budget material described planned total 2027 spending and major borrowing, including a constitutional exception connected with defence and security expenditure. These documents establish proposed allocations, not all final contract awards or cash payments. Borrowing to buy long-lived defence assets can be defended as an intergenerational response to a durable security risk. But it also creates debt-service exposure that future taxpayers must finance.

German pension and welfare obligations complicate the argument because they are not interchangeable with discretionary investment lines. Pension formulas and contributions operate under legal and political rules, while equipment procurement is often multiannual and subject to delivery risk. A finance minister may use borrowing exemptions for defence while maintaining social transfers, but that does not eliminate the future tradeoff if interest costs or other spending rise. Criticism should be aimed at the financing mechanism and measurable outcomes, not at a fictional claim that a particular pension was reduced by a defence purchase absent an enacted law. The country's exposure can be tested through debt issuance plans, net borrowing figures, interest expenditure and the proportion of procurement spending that yields equipment on time.

Italy's constraint is more immediate because its large public debt makes changes in market financing conditions politically sensitive. Reuters reported in early October that the Italian government was reducing the pace of a planned military spending increase as higher debt costs and energy prices complicated its budget. That account is a warning against treating the NATO timetable as automatic implementation. Italy can affirm the alliance's objectives while choosing a slower fiscal path; the resulting question is whether it can still meet agreed capability requirements. Delaying a contract may save cash this year but raise future costs if equipment prices rise, production slots fill or an ageing fleet needs expensive maintenance. Conversely, rushing costly procurement to make a ratio look better may lock the government into poor value.

Canada sits between these models. Its extensive territory, Arctic requirements and alliance obligations create a strong case for investment in maritime, aerospace, surveillance and logistical capabilities. But an appropriation does not guarantee a delivered patrol system, vessel or munition. Defence purchasing depends on industrial capacity, workforce availability and often complex cross-border supply chains. When commitments are discussed against a GDP benchmark, a slower economy can mechanically change the ratio even if actual spending is static. This creates a perverse incentive to celebrate percentage changes without identifying real operational improvements. Canadians should be shown signed contracts, milestones, delivery dates, maintenance obligations and financing terms. Those measures also expose whether local firms receive work or whether much of the economic gain accrues abroad.

The eastern-flank countries have a different claim on the alliance's resources. Poland and the Baltic states face direct security pressures near Russian and Belarusian borders and have strong incentives to obtain interoperable air defence, ammunition, logistics and reinforcement capacity quickly. Higher spending by Britain, Germany, Italy and Canada may create a collective benefit even if the equipment is not based at home. But the benefit depends on readiness, not the political value of an announced figure. A functioning ammunition supply chain or air defence network can matter more than an expensive national showcase programme. That is why NATO deterrence capacity (opens in a new tab) should be assessed through deployable forces, stockpiles, training, maintenance and reinforcement times rather than the spending ratio alone.

Defence companies are probable financial beneficiaries, but their gains must be described carefully. An announced procurement envelope is not a company payment. A preferred bidder is not the same as a signed and performed contract. A signed contract does not establish the supplier's eventual profit after delivery costs and penalties. Share prices can react to expectations long before revenue arrives. The firms most likely to benefit are those producing high-demand munitions, air defence components, electronics, military vehicles and maintenance services, along with second-tier suppliers. Public procurement can expand manufacturing and technology capacity, but a concentrated supplier market can also weaken competition. Governments must publish competitive tender results, unit prices where security allows, change orders and completion audits.

Who pays is equally varied. Taxpayers pay directly when governments increase taxes or move spending from other programmes. Borrowers and future taxpayers pay through interest and refinancing costs when expenditure is debt-financed. Users of public services pay indirectly if capital projects are postponed or maintenance is deferred. Inflation and higher import prices can increase the actual cost of equipment and reduce the purchasing power of defence appropriations. Some gains can come back through wages, corporate taxes and exports, but these do not make every contract self-financing. The fiscal-policy-sustainability driver (opens in a new tab) is therefore central: it measures the durability of the financing choice, not whether a military procurement announcement sounds strategically necessary.

The welfare argument deserves more precision than a simple weapons-versus-pensions slogan. Pensions are usually recurrent transfers supporting present consumption and contractual expectations. Defence capital purchases can create assets serving for decades, while ammunition is consumed and must be replenished. Hospital buildings, electricity grids and transport systems are capital assets too. A government may need all three categories at once. The honest budget comparison should separate current spending, capital spending, contingent guarantees and borrowing costs. It should also show which obligations are statutory, which are discretionary and which are delayed rather than cancelled. The cost-of-living-pressure driver (opens in a new tab) matters because a tax rise or lower service provision can hurt households even if the defence rationale is strong.

What it moves: Core defence expenditure as a share of GDP is set to increase under national plans, but delivery and actual spending may lag commitments. UK non-defence capital allocations face downward pressure over the announced three-year period if the reductions are implemented. German government borrowing and subsequent debt-service exposure are likely to remain elevated under its published 2027 draft. Italian defence procurement growth may be slower than earlier proposals, while its bond yields will remain an important constraint. Canadian procurement backlogs and delivery times are essential indicators and should decline if higher funding is effective. Across NATO, supplier order books may rise, while public-service capital completion rates risk weakening where finance is transferred away. Tax rates, pension adequacy and household incomes cannot be predicted from the NATO percentages alone.

The strongest counterargument is that defence spending is insurance against a much greater economic loss. An attack on a member state could cause destruction, displacement, energy interruption and a collapse in investment far beyond the ordinary cost of military readiness. Deterrence also has a public-good character: one ally's capability can protect another. That case is substantial and makes an exclusively short-term budget comparison incomplete. But precisely because the security benefit is hard to observe when deterrence works, governments should insist on evidence from exercises, stockpile readiness and independent procurement audits. A moral argument for security does not excuse inflated prices, weak contract terms or secrecy unrelated to military necessity.

The next accountability point is the UK's promised spending review, where ministers will have to show how the planned progression toward three and 3.5 percent is financed. In Germany, budget passage and subsequent borrowing data will show whether proposed capacity becomes enacted spending. Italy's final fiscal documents and procurement schedule will reveal what slowing the pace means in practice. Canada's future defence estimates and contract records will indicate whether procurement can turn ambition into operational capability. NATO should publish comparable data that separate national cash outlays, broad resilience categories and core equipment readiness. Without these distinctions citizens cannot tell whether an apparently larger defence budget is buying new protection or simply changing the presentation of existing obligations.

Sources: NATO — Defence investment and the five-percent commitment, June 29 (opens in a new tab); HM Treasury — Budget 2026, October 28 (opens in a new tab); UK Parliament Hansard — Financial Statement and Budget Report, October 28 (opens in a new tab); Reuters — UK Defence Investment Plan funding, October 28 (opens in a new tab); ITV News — IFS questions defence finance detail, October 28 (opens in a new tab); German Federal Ministry of Finance — Draft 2027 budget, July 6 (opens in a new tab); German Bundestag — 2027 draft budget presentation (opens in a new tab); Reuters — Italy reduces defence spending increase, October 2 (opens in a new tab).