The European Union has spent four years unpicking the knots that Viktor Orbán, Hungary’s prime minister, tied into many a security file. On Sunday, April 12th Hungarian voters will decide whether those knots are finally cut. The outcome will shape not only cash for Ukraine but the credibility of Europe’s fledgling defence union.

When it comes to the flow of cash, six plumbing systems—worth more than €100bn between them—now depend on what happens in Budapest: the €17bn European Peace Facility (EPF), the €90bn Ukraine Facility loan, annual windfalls from frozen Russian assets, common-procurement schemes (EDIRPA and EDIP), Military Mobility cash inside the Connecting Europe Facility, and large chunks of the European Defence Fund that automatically freeze when rule-of-law doubts persist.

Even seasoned Eurocrats blanch at the arithmetic. Hungary’s single veto has kept €6bn in EPF reimbursement stuck since 2025, stalled a €4bn top-up for rail corridors, and blocked the disbursement rule for Russia-asset windfalls that would have sent Kyiv €2-3bn every year.

Orbán’s loss

Cohesion and recovery funds worth €19bn are themselves frozen under the Union’s Conditionality Regulation. Investors in 155 mm shell factories, drone start-ups and armoured-vehicle plants have delayed expansion because nobody knows when the money to reimburse member-state donations to Ukraine will finally arrive.

European officials therefore talk about the Hungarian election with the trepidation central bankers reserve for inflation data. It matters because everything else—arms, rail gauges, Russian assets—hinges on whether Mr Orbán stays or goes.

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Should the opposition scrape victory, the first change would be visible within weeks. The new government, desperate for goodwill and EU cash, would back the mini-revision of the Multiannual Financial Framework (MFF) that finances the Ukraine Facility. EcoFin ministers could pass the measure at their first post-election sitting. That single vote would unlock €90bn, covering Kyiv’s budget gap before midsummer and allowing the Commission to tap markets on more favourable terms than any inter-governmental workaround.

The EPF blockage, too, would vanish. Council lawyers already have a draft decision ready to reimburse about €6bn to member states that emptied their stocks for Ukraine in 2025. Without Hungary’s veto, the cheques go out, suppliers get paid and small ammunition producers finally receive contracts large enough to justify adding shifts.

Russian assets

The rule covering windfall profits on frozen Russian assets would pass at the same Council meeting, sending €2-3bn to Ukraine each year via the same facility. Lenders that priced the cash into a late-summer disbursement will breathe again.

A second boost comes from infrastructure. The MFF amendment that carries the Ukraine Facility also earmarks €1.5bn for Military Mobility and €1bn for EDIP, the post-EDIRPA procurement tool. Clearing the Hungarian hurdle gives ports at Constanţa and Klaipėda certainty that money for dual-use cranes and wider railbeds will arrive before 2027. It also lets German-led Sky Shield proceed at industrial scale; Hungary, newly cooperative, could re-join the project, adding radar sites that plug a gap over the Carpathians.

Unanimity in foreign policy might, paradoxically, survive a friendly Hungary. The memory of obstruction would endure, but the immediate appetite for treaty change would fade as crises ease. Sanctions roll-overs on Russia, hostage to Hungarian horse-trading since 2022, would cease to be cliff-edge dramas. Investors would mark the political risk premium on EPF reimbursements at zero, making it cheaper for the EU to borrow for future defence funds.

Other effects on EU policies

Hungarian universities, now excluded from Horizon Europe because their assets sit in opaque public-interest trusts, would expect swift readmission once parliament passes the judicial-independence bills that Brussels demanded. Released cohesion money—a sweet lump sum of €19bn—would stop serving as a bargaining chip in Council corridors.

Yet the lesson would not be forgotten. Germany and France may slow talk of a treaty-level switch to qualified-majority voting in defence, but they would keep their lawyers busy drafting passerelle clauses and “constructive abstention” procedures for the next crisis. The precedent remains: one prime minister, in power for a decade, paralysed Europe’s war-economy pivot for two full years.

I will not allow one country, and I will certainly not allow Mr Orbán, to take decisions upon the entire European future. — Danish Prime Minister Mette Frederiksen

Storm clouds would gather again only if the new Hungarian government wobbled. Investors would watch how quickly it completes the paperwork to unfreeze funds, how it votes on the next sanctions package, and whether it keeps the defence budget on the path to two per cent of GDP. Yet the immediate direction would be clear: Europe’s security pipes unclog, and the cash begins to flow.

If Orbán wins

A very different script unfolds if Mr Orbán remains in the Castle District. “Hungary benefits from being a member of the most exclusive clubs on the planet because crucial decisions require unanimity and Orbán can leverage his veto for personal gain,” according to Peter Kreko, director of the Political Capital Institute, Budapest. There no reason to think things would change after Mr Orbán’s re-election.

 The day after the vote finance ministers will meet in Luxembourg with the same agenda they failed to clear all winter. The €90bn Ukraine Facility will stay stuck; the EPF top-up for 2026—another €5-7bn—will not be tabled. Member states will leak that they are “exploring alternatives”, but markets know workarounds take time and carry legal risk. Brussels will prepare short-term emergency funds while Kyiv scrambles for bridge financing.

Windfall profits on Russian assets need unanimous adoption each year. Hungary can block the implementing regulation, freezing at least €2bn annually. Diplomats whisper about “delinking” the decision from unanimity via Article 31(3) of the Treaty on European Union, but that requires, again, unanimous agreement at the European Council level, meaning Budapest must sign its own disempowerment.

Nobody counts on that. Military Mobility and EDIP increases, tied to the same MFF vote that funds Ukraine, will slip beyond 2027. Rail bridges on the Baltic–Black Sea axis will remain single-track bottlenecks, and ammunition plants will hesitate to expand.

Deepening freeze

The rule-of-law freeze deepens. Parliament has already demanded that all budget lines, including agriculture and Erasmus+, be suspended. Cross-party MEPs sent a letter last May urging the Commission to “freeze everything”, and Brussels has daily Court fines of €1m ready for disbursement. A comprehensive suspension would dent Hungary’s budget by about three per cent of GDP each year, widening a deficit already projected at 5.2 per cent. That, in turn, would push up domestic bond yields and risk-scores at rating agencies, squeezing Mr Orbán’s fiscal room to manoeuvre.

Industrial knock-ons follow. Hungarian entities might be deemed ineligible for EDF calls or left out of EDIP consortia. The €16bn military-modernisation plan, halted in March 2026 when suppliers feared non-payment, would remain on ice. Neighbours plotting joint orders—like the Czech-Slovak infantry-vehicle project—would exclude Budapest to avoid auditing trouble.

We see straightforward commitment from the part of EU leadership to try to circumvent potential vetoes coming from Hungary and Slovakia and put important decisions on the footing of qualified majority voting. — Dániel Hegedűs, German Marshall Fund.

The toolkit is broad and increasingly sharp. First comes the ‘Peace Facility minus Hungary’. Lawyers dust off Article 31 TEU on constructive abstention: if Budapest sits out, the Council can record unanimous consent and adopt EPF decisions. Failing that, leaders may invoke the passerelle in Article 31(3), which lets them switch the EPF to qualified-majority voting after one unanimous decision.

Resolve mounts

In Brussels, political will to do this may well emerge. “I will not allow one country, and I will certainly not allow Mr Orbán, to take decisions upon the entire European future,” said Danish Prime Minister Mette Frederiksen at the end of a leaders’ summit in Copenhagen.

France and Germany fret about precedent, yet acknowledge that delivering €6bn to Kyiv may trump constitutional squeamishness. A third variant is variable geometry: an ad-hoc Common Foreign and Security Policy (CFSP) decision financed only by the willing. Precedent exists—voluntary EPF top-ups for Africa between 2022 and 2024—so Hungary, if it refuses to pay, forgoes a vote.

Enhanced co-operation offers a second route. Under Articles 20 TEU and 332 TFEU at least nine willing states can adopt measures binding only on themselves. Twenty-four members already used the procedure in December 2025 to approve a €90bn Ukraine loan when Hungary, Czechia and Slovakia abstained. The same club, perhaps joined by Denmark and Sweden, could top-up the MFF ceiling for Military Mobility and EDIP without breaching Article 311 on budget discipline. Non-participants carry no liability if Ukraine later defaults.

The conditionality game

A third lever is conditionality escalation. The Commission could freeze all budget lines, including €1.5bn a year in CAP funds vital to Fidesz’s rural base. It could link access to the post-2028 MFF directly to annual rule-of-law scores and threaten an Article 7(3) suspension of Hungary’s Council voting rights, though that still lacks the four-fifths majority of states required.

The Union can also move steel rather than statutes. Alternative supply corridors already sit on the TEN-T core network. An upgraded rail link from Constanţa on the Black Sea via Bucharest to Siret near the Ukrainian border will carry drones and diesel once Brussels signs the 50–70 per cent co-financing agreement. Slovakia’s standard-gauge pilot between Košice and Uzhhorod, financed by Solidarity Lanes money, avoids Hungarian customs entirely.

Hungary benefits from being a member of the most exclusive clubs on the planet because crucial decisions require unanimity and Orbán can leverage his veto for personal gain. — Peter Kreko, Political Capital Institute, Budapest

Rail Baltica’s southward extension from Klaipėda to Rzeszów would let ammunition roll to Lviv without crossing a single Hungarian sleeper. Even a 20 per cent shift of cargo away from Hungary cuts Budapest’s transit fees and dilutes its leverage over sanctions roll-overs.

Memory of obstruction

Broader political dynamics explain why all this matters. Each workaround chips at the mystique of unanimity. If twenty-six states pool resources outside the treaties, the hold-out loses not just money but influence. Hungary risks an EU where more and more decisions sidestep it, leaving Budapest a spectator. Yet coalitions of the willing also feed eurosceptic stories of a two-tier Union. That is worry which Paris and Berlin weigh before reaching for the nuclear option.

If Mr Orbán loses, the EU’s security plumbing unblocks almost overnight. EPF cheques arrive, the Ukraine Facility moves and sanctions roll-overs calm. Investors gain confidence to expand shell plants and drone lines. Treaty reform may cool, but the memory of obstruction remains.

Should the prime minister hold on to his chair, howeer, Europe faces another season of patch-and-bypass. Cash will reach Kyiv eventually through enhanced co-operation or passerelle clauses, but later and at higher cost. More dossiers will shift to qualified-majority voting, and Budapest will discover that vetoes, wielded too often, breed detours.

“We see straightforward commitment from the part of EU leadership to try to circumvent potential vetoes coming from Hungary and Slovakia and put important decisions on the footing of qualified majority voting,” said Dániel Hegedűs, regional director of the German Marshall Fund. Either way, Brussels has a great chance to internalise one lesson. Dependency on unanimity for defence finance is strategically unsustainable.