Serbia is preparing to change one of the less visible but economically important mechanisms through which the state supports public companies: sovereign guarantees.
Amendments to the Public Debt Law, now moving through parliament, would make the charging of a guarantee commission mandatory from 1 January 2027, replacing the current framework under which the state merely may charge a fee.
The reform is being presented as part of Serbia’s wider alignment with EU state-aid rules, but its practical impact could reach much further.
For companies such as EPS, Srbijagas, Transnafta and state-controlled transport operators, sovereign guarantees have long been an important financing instrument. They allow public companies to borrow at lower interest rates because lenders rely ultimately on the Serbian state rather than solely on the borrower’s own creditworthiness.
That lowers financing costs for infrastructure.
It also transfers risk to taxpayers.
Serbia is now moving toward a model in which that support is explicitly priced.
The change looks technical. It is not.
It begins turning an implicit subsidy into an identifiable financing cost.
Guarantees have become a major part of Serbia’s infrastructure model
Serbia’s public investment cycle increasingly depends on borrowing by companies that do not always have balance sheets strong enough to finance large projects independently.
Energy companies provide the clearest example.
EPS must invest simultaneously in generation, grids, environmental compliance, renewable energy and storage.
Srbijagas faces major requirements around pipelines, storage, network expansion and diversification.
Transnafta is preparing strategic oil infrastructure.
Railway companies continue to modernise rolling stock and infrastructure.
These investments often involve hundreds of millions of euros.
International financial institutions and commercial banks are willing to lend, but they frequently require sovereign backing when the underlying borrower is state-owned or financially constrained.
The guarantee effectively tells the lender: if the company cannot repay, the Republic of Serbia will.
That can reduce interest margins dramatically.
But it also means the state is providing something economically valuable.
Until now, that value has not necessarily been priced systematically.
The proposed law changes that principle.
Serbia already knows guarantees can become real debt
The reform arrives after another reminder that guarantees are not theoretical obligations.
Serbia paid approximately RSD 25.6 billion in 2025 after guarantees were called because borrowers did not meet obligations themselves.
At the end of March 2026, guaranteed debt stood at around RSD 199.3 billion.
Of that amount, approximately RSD 122.6 billion related to EPS and Srbijagas.
This is precisely why guarantees matter to public finances.
They sit outside conventional central-government debt servicing until something goes wrong.
When a borrower performs well, the guarantee may cost the budget nothing.
When it does not, a contingent liability becomes an actual fiscal payment.
That creates an asymmetry.
The public company receives cheaper borrowing immediately.
The state receives the risk.
Pricing that risk through a guarantee fee is therefore economically logical.
The harder question is how the fee is calculated.
Pricing methodology will determine whether the reform matters
A nominal fee has little value if it is too small to reflect risk.
A properly designed guarantee commission should depend partly on the probability that the state will ultimately have to pay.
A financially strong company should pay less.
A weak borrower with persistent losses should pay more.
That creates a market-style signal inside the public sector.
If EPS finances a project supported by strong operating cash flow, its guarantee cost should logically differ from that of a company requiring regular budget support.
Similarly, commercially viable infrastructure should not carry the same state-support price as projects with weak economics.
This could become a useful discipline.
Public companies may begin seeing the sovereign guarantee not as a free administrative instrument but as a financing input with an explicit cost.
That can affect project selection.
A marginal investment may look attractive when the state guarantee is free.
It can become less attractive once the support is priced.
The reform could raise headline borrowing costs
For lenders, little may change initially.
A Serbian sovereign guarantee remains strong credit enhancement.
The bank still benefits from state backing.
But the borrower’s all-in financing cost rises because it now has to pay both interest to the lender and a guarantee fee to the state.
For large infrastructure programmes, even a relatively small fee can become material.
A 0.5% annual guarantee charge on €500 million of debt would represent €2.5 million per year.
At 1%, the cost becomes €5 million annually.
Over a long-tenor infrastructure loan, this can meaningfully affect project economics.
That will be particularly important in sectors where revenue is regulated.
Energy networks, gas infrastructure and transport projects cannot always pass higher financing costs to customers immediately.
The fee may therefore ultimately appear in tariffs, public-company profitability or future budget support.
The reform does not make state guarantees disappear.
It makes their economics more visible.
EPS could feel the change most strongly
No Serbian public company faces a larger long-term investment requirement than Elektroprivreda Srbije.
EPS must modernise a power system still heavily dependent on lignite while simultaneously expanding renewables and flexibility.
Battery storage is becoming more important.
Wind and solar investment is growing.
Mining operations require modernisation.
Environmental compliance remains expensive.
Grid-related requirements continue.
Much of this investment will need debt.
Sovereign guarantees can remain an efficient way to lower borrowing costs, especially for projects supported by development banks.
But from 2027, the state may increasingly demand compensation for providing that support.
This makes EPS’s own financial performance more important.
The stronger the company becomes operationally, the less it should theoretically need state-backed borrowing.
That is consistent with the wider EU direction.
Public utilities should increasingly finance investments based on commercial balance sheets rather than relying indefinitely on implicit state support.
For Serbia, however, the transition will take time.
EPS remains too strategically important for the government simply to withdraw support.
Srbijagas presents a different risk profile
Srbijagas is another major guaranteed borrower.
Its infrastructure role is strategic, but its financial history has been more complicated.
Gas-price regulation, historical debts and politically influenced commercial arrangements have repeatedly created balance-sheet pressures.
At the same time, Serbia now needs additional gas infrastructure.
Diversification requires capital.
The country is preparing new transmission sections, regional interconnections and potentially additional storage.
World Bank-backed proposals around the Trupale–Pojate corridor indicate the scale of the coming investment cycle.
Mandatory guarantee pricing could therefore force a more explicit discussion about who pays for gas-security investments.
If Srbijagas cannot absorb the fee through operating cash flow, the cost may eventually be reflected in network tariffs or state support.
Again, the reform does not eliminate the fiscal burden.
It makes part of it transparent.
Transnafta shows why the timing matters
The change is also relevant to Transnafta, particularly as Serbia prepares the planned oil connection toward Hungary.
The project has already moved into a financing framework involving a sovereign guarantee and domestic-bank lending.
Strategic-energy infrastructure often struggles to justify itself on narrow commercial metrics because the principal benefit is resilience.
A second crude-supply route may be valuable even if utilisation is modest under normal conditions.
That means the project can require state support.
A mandatory guarantee fee raises an interesting policy question.
Should strategically necessary projects pay a full commercial-style guarantee charge even when their purpose is national security rather than corporate profit?
The law will need enough flexibility to distinguish between commercial support and public-policy infrastructure.
Too generous a regime would undermine the reform.
Too rigid a regime could increase the cost of projects the state wants built for strategic reasons.
EU state-aid alignment is the deeper driver
The reform cannot be understood separately from Serbia’s accession process.
EU competition rules are built around the principle that state-owned companies should not receive hidden advantages unavailable to private competitors.
A sovereign guarantee provided for free can constitute precisely such an advantage.
A private company would normally pay for credit enhancement.
If a state-owned enterprise receives it without compensation, its financing costs may be artificially low.
Charging a market-consistent guarantee fee is therefore one way of reducing state-aid concerns.
This is part of a much larger Serbian policy shift.
The country is simultaneously reconsidering corporate tax holidays, payroll-tax incentives and free-zone customs benefits.
Taken together, these reforms suggest Serbia’s traditional investment-support architecture is gradually being replaced by a more EU-compatible model.
The guarantee reform is the public-company side of that transition.
Domestic banks could still benefit
Serbian commercial banks have become increasingly involved in infrastructure financing.
Large domestic lenders can provide long-tenor loans when the sovereign guarantees repayment.
This offers attractive risk-adjusted returns.
Mandatory guarantee pricing does not necessarily reduce that appetite.
The guarantee remains valuable.
But borrowers may begin comparing funding sources more aggressively.
An EBRD or World Bank loan with favourable pricing but an added state guarantee fee may need to be compared against commercial loans, bonds or project-finance structures without explicit sovereign backing.
This could encourage diversification.
Companies with strong projects may seek financing that relies more on project cash flow.
Others may issue corporate bonds.
Some may use blended structures.
The reform could therefore support deeper capital-market development indirectly.
The state gains revenue but also a better risk signal
For the government, guarantee fees create two benefits.
The first is revenue.
If public companies pay for guarantees, the state receives compensation for assuming risk.
The second is potentially more important: information.
A pricing framework forces the state to assess risk more systematically.
Guarantees can no longer be treated simply as political approvals attached to infrastructure projects.
The government needs to understand the borrower’s balance sheet, repayment capacity and contingent fiscal risk.
That can improve debt management.
It may also make parliament and investors more aware of the true cost of public infrastructure.
A project financed through a state-owned company can appear outside headline budget expenditure even though taxpayers ultimately carry much of the risk.
Guarantee pricing does not fully solve that problem.
But it makes the transfer of risk harder to ignore.
Infrastructure tariffs may eventually reflect the change
The long-term economic consequence could appear in regulated prices.
If EPS, Srbijagas or transport companies face higher financing costs, they need revenue to service them.
That can mean higher electricity-network charges, gas tariffs, transport fees or other regulated revenues.
This is not necessarily negative.
Infrastructure has a cost.
Artificially suppressing that cost simply moves the burden somewhere else.
The EU model increasingly favours transparent cost recovery.
But Serbia will need to manage the social consequences carefully.
Energy tariffs remain politically sensitive.
A reform designed around state-aid compliance can eventually become visible to households through regulated pricing.
That linkage should be acknowledged early.
The reform could improve public-company discipline
A mandatory guarantee commission may also change management incentives.
Public-company executives have historically operated with an assumption that strategic importance creates access to sovereign backing.
Pricing that support creates a financial penalty for dependence.
Companies with stronger balance sheets may eventually avoid guarantees altogether.
That would be a positive development.
A mature public utility should be capable of borrowing based on its own financial strength.
Sovereign guarantees should be reserved for genuinely strategic or transitional cases.
The reform therefore creates a path toward greater financial independence.
Whether Serbia follows that path will depend on corporate governance.
A guarantee fee alone cannot transform a weak public company.
Tariff policy, procurement, management accountability and operational efficiency remain more important.
But pricing support removes one distortion.
Guarantees should not become another hidden tax
There is also a risk on the other side.
The guarantee commission should reflect credit risk rather than simply become another revenue-raising mechanism.
If the state charges excessively high fees, it could undermine otherwise sound public investments.
The methodology therefore needs transparency.
Borrowers and lenders should understand how the fee is calculated.
Risk categories should be clear.
Strategic-project treatment should be defined.
The process should avoid discretionary negotiation wherever possible.
Otherwise the reform could replace one opaque subsidy with an opaque charge.
Serbia’s public investment model is becoming more market-based
The broader direction is nevertheless clear.
Serbia is gradually moving toward a public-finance model where state support must be identified, valued and justified.
That is a major change.
During the rapid infrastructure buildout of the past decade, the overriding objective was often execution.
Roads had to be built.
Energy assets had to be financed.
Public companies borrowed with state backing.
The cost of contingent liabilities received less attention.
As Serbia moves closer to EU fiscal and competition frameworks, that approach becomes harder to sustain.
The next investment cycle will require more explicit risk allocation.
Who borrows?
Who guarantees?
Who pays the guarantee fee?
Who ultimately bears the cost if the project fails?
These questions will increasingly influence financing before contracts are signed.
2027 could mark an important transition
The planned 1 January 2027 effective date gives public companies and lenders time to adjust.
Projects already under development will need to model the new cost.
Future loans may require revised financial assumptions.
Budget planners will need to forecast guarantee-fee revenue.
Regulators may need to consider the impact on tariffs.
The change will be particularly important for the large energy and transport projects Serbia plans during the remainder of the decade.
A guarantee that previously appeared almost costless to the borrower will now have an explicit price.
That may seem like a small accounting change.
Across billions of euros of future infrastructure borrowing, it is not.
Serbia’s state balance sheet has long supported public investment indirectly through guarantees.
From 2027, the government intends to make companies pay for that support.
The reform will not end sovereign-backed infrastructure finance.
But it could make the true cost of Serbia’s investment model considerably harder to hide.
