Yield-Co Structures for Vietnam Solar and Wind Assets

Vietnam’s feed-in-tariff boom left behind one of Southeast Asia’s largest fleets of operating solar and wind plants, much of it still held by the original developers and their bank lenders. A yield-co is the vehicle that lets those developers recycle capital: operating assets are aggregated under a holding company, sold down to long-term investors, and refinanced against stable PPA cash flows. Done well, a yield-co gives sponsors a clean exit and buyers predictable income.

Done badly, it stumbles on approvals, tariff disputes and tax leakage. This article explains the structure, the approvals and the pricing issues that decide whether a portfolio sell-down closes.

Contents

• Why the Yield-Co Model Is Reaching Vietnam
• Anatomy of a Yield-Co and Holdco Structure
• FiT PPA Assets: What a Buyer Is Really Buying
• Approvals and Power Plant Share Transfer Mechanics
• Wind Farm Refinancing with Portfolio Bonds and Term Loans
• Who Buys: Renewable Infrastructure Investors
• Valuation Drivers: Curtailment, EVN Credit and PPA Tenor
• Tax Leakage and DTA Planning
• Frequently Asked Questions

Why the Yield-Co Model Is Reaching Vietnam

Developers who built plants under the feed-in tariff regime now face three pressures at once. Construction-era bank debt is maturing or repricing. Sponsor balance sheets are stretched by new pipelines, including projects under the revised Power Development Plan VIII and direct power purchase arrangements. And the buyer universe prefers operating, de-risked assets over development risk.

A yield-co answers all three: the yield-co packages operating cash flows into a single investable platform, returns equity to the sponsor, and lets new capital in at a price that reflects contracted revenue rather than construction risk.

The policy backdrop reinforces the yield-co case. The Law on Electricity 2024 and its implementing decrees, together with the DPPA mechanism introduced in 2025, point new capacity toward storage-backed and market-linked models. Legacy FiT plants, by contrast, are bankable, metered and already operating. For many sponsors, selling them into a yield-co is the cheapest way to fund the next phase. Readers should confirm the current text and effective dates of each instrument before relying on it, because the framework has moved quickly.

Anatomy of a Yield-Co and Holdco Structure

A yield-co is, in legal terms, simply a holding company that owns shares in several project companies and distributes most of their free cash flow. In Vietnam, each plant sits in its own project company, usually a limited liability or joint stock company holding the investment registration certificate, the electricity activities licence and the PPA. The yield-co or holdco sits above them and is the entity that investors actually buy into, so the yield-co structure drives governance, tax and exit.

Yield-Co Holdco: Offshore or Onshore?

Many yield-co platforms use an offshore yield-co holdco in a treaty-friendly jurisdiction, because it gives buyers familiar governing law, flexible share classes and easy exit by selling the holdco. The trade-off is Vietnamese tax: authorities treat indirect transfers of Vietnamese assets as taxable in specific circumstances, so an offshore yield-co does not by itself remove Vietnamese tax exposure.

An onshore yield-co keeps everything under Vietnamese law and avoids indirect-transfer arguments, but it is less liquid for international buyers and adds a layer of dividend flows. The right answer depends on the buyer base, the planned exit and the treaty position, and it should be modelled before any pricing is agreed.

Ring-Fencing and Portfolio Aggregation

Most sponsors do not own every plant outright. Minority partners, local co-investors and EPC contractors often hold stakes. Aggregating those interests into one yield-co requires pre-sale reorganisations: buying out minorities, aligning shareholder agreements, and cleaning up land-use rights and construction permits. Each plant should stay in its own company so that lenders, EVN and regulators continue to deal with the same legal entity. Ring-fencing inside the yield-co also lets a buyer exclude a problem asset rather than walk away from the whole portfolio.

FiT PPA Assets: What a Buyer Is Really Buying

For buyers, FiT PPA assets are a bundle of contractual rights, and the PPA is the heart of it. Diligence therefore starts with the tariff, the term, the delivery point, the take-or-pay language and the termination provisions, and only then turns to the equipment.

FiT1 and FiT2 in Brief

Vietnam introduced feed-in tariffs for wind in 2011 and expanded them for solar in 2017 under prime ministerial decisions, with later decisions setting a second round of solar tariffs for plants reaching commercial operation in defined windows around 2019 and 2020, and extending the wind window to late 2021.

Tariffs are stated in US cents per kWh but paid in VND, converted by reference to an exchange rate fixed in the PPA, and the standard-form PPA runs for twenty years from commercial operation. Buyers should check the exact decision, the applicable tariff level and the date the plant was recognised as operating, because eligibility turns on that date.

The tariff levels and deadlines above are described generically and must be verified against the primary decisions.

The Retroactive Tariff-Adjustment Question

The most sensitive issue for any FiT PPA assets deal is whether approved tariffs can be revisited after the fact. In recent years, authorities and EVN have reviewed projects whose commercial operation recognition, documentation or timing was questioned, and proposals for adjusting or renegotiating tariffs for some projects have circulated publicly. Positions on whether such adjustments may apply retroactively, and on what legal basis, have been contested and have evolved.

We describe the issue only in general terms, and any buyer should verify the latest official position, any pending guidance and the project-specific facts before pricing.

In practice, a buyer protects itself in four ways: a specific diligence workstream on commercial operation recognition and regulatory correspondence, a tariff-adjustment price mechanism such as a holdback or deferred consideration, an indemnity or warranty package that survives completion, and a walk-away right for assets whose tariff status is unclear.

Approvals and Power Plant Share Transfer Mechanics

A power plant share transfer is usually the preferred route, because the PPA, licence and land rights stay inside the project company and do not need to be reassigned. That does not mean the transfer is approval-free. The checklist below is the one we use to structure timetables.

Corporate, Investment and Competition Approvals

Under the Law on Investment 2020, a foreign buyer acquiring shares in a Vietnamese company may need to register the share purchase with the investment authority, depending on the resulting foreign ownership and the sector, and the investment registration certificate may need to be updated. Power generation is generally open to foreign investors, but the conditions should be confirmed for each plant.

Separately, the Law on Competition 2018 requires an economic concentration filing where deal value or market share thresholds are met, and several large portfolios cross the deal-value threshold even when market share is small. Charter documents, shareholder resolutions and any pre-emption rights must also be respected.

EVN, Licence and Lender Consents

Standard-form PPAs commonly restrict assignment and may contain change-of-control or notification provisions, so a share deal should still be checked against the PPA text. The electricity activities licence generally stays with the project company, but updated particulars may need to be notified to the electricity regulator. Existing lenders will usually require consent or repayment, because their security over shares, accounts and receivables is triggered by a change of ownership.

Securing these consents in parallel, rather than in sequence, is the single biggest driver of timetable certainty.

Wind Farm Refinancing with Portfolio Bonds and Term Loans

Wind farm refinancing, and solar refinancing more broadly, is the second half of most yield-co transactions, and a solar portfolio acquisition is often paired with it. Construction loans were often sized conservatively and priced for completion risk. Once a plant has operated for a few years, an aggregated portfolio can usually borrow longer and cheaper.

Two routes dominate. The first is a portfolio term loan from domestic banks, or from international lenders with a local currency facility, secured on shares in the project companies, project accounts and assignment of PPA receivables. The second is a corporate bond issue by the yield-co or a financing vehicle. Private placement bonds are governed by Decree 65/2022/ND-CP as amended by Decree 08/2023/ND-CP, and public offerings fall under the Law on Securities 2019.

Each route has its own issues. Security over PPA rights depends on EVN’s consent. Foreign loans must be registered with the State Bank of Vietnam and observe foreign exchange rules. Related-party interest may face deductibility limits under the transfer pricing decree. And the VND tariff against hard-currency debt leaves a currency mismatch that lenders will price.

A sensible sequencing is to refinance first, then sell down, because investors will pay more for a yield-co with stable, long-tenor debt, and because the sponsor can distribute the refinancing proceeds as a return of capital. Some deals invert the order, with the buyer bringing its own acquisition debt, in which case the existing lenders’ consent and prepayment costs become an acquisition cost.

Who Buys: Renewable Infrastructure Investors

The buyer universe for Vietnamese operating assets is dominated by two groups: financial investors and strategic buyers. Renewable infrastructure investors differ in return targets, structure preferences and tolerance for tariff uncertainty, which is why a sell-down process should be tailored by buyer type. The table below summarises typical yield-co buyer profiles in general terms.

Buyer type	Typical motivation	Preferred structure	Main diligence focus
Infrastructure and private equity funds	Stable yield, defined holding period, exit to another fund or strategic	Offshore holdco, majority stake, acquisition debt	Tariff status, curtailment history, exit liquidity
Japanese strategics and trading houses	Long-term platform, equipment and offtake synergies, regional portfolio	Joint venture with sponsor, staged stake acquisition	Governance, technical condition, compliance
Singaporean strategics and platforms	Regional aggregation, capital recycling, listed or fund-backed yield vehicles	Holdco purchase, platform add-ons	Tax leakage, treaty position, financing terms
Thai strategics and utilities	Portfolio growth, ASEAN diversification, development pipeline	Majority stake, development partnership	PPA terms, local partner alignment, grid risk

The table is a simplification; individual investors vary. What matters is that sponsors who understand these differences can set up a process in which the right buyer sees the right structure first.

Valuation Drivers: Curtailment, EVN Credit and PPA Tenor

Valuation of a yield-co portfolio is a discounted cash flow exercise, but three variables explain most of the price gap between assets that look similar on paper.

Curtailment and Grid Risk

Curtailment, meaning grid-directed reduction of output, has been a real issue in provinces where solar and wind capacity grew faster than transmission. Buyers will ask for several years of dispatch data, the contractual treatment of curtailed energy, and the regional outlook for grid reinforcement. A plant whose PPA compensates for curtailed output is valued differently from one that does not, and the difference should be modelled explicitly rather than averaged.

EVN Credit and Payment Performance

Almost all revenue comes from EVN or its power corporations, so offtaker credit is the dominant counterparty risk. Buyers look at payment history, any arrears, and the likelihood of sovereign or ministerial support for EVN’s obligations. Yield-co buyers also test whether the PPA contains meaningful remedies for late payment. Where payment delays are documented, the price will reflect them.

PPA Tenor and Tariff Profile

The remaining PPA term sets the horizon of contracted cash flow. A plant with twelve years left is not worth twelve-twentieths of a new plant, because the post-PPA merchant tail is uncertain under the evolving market rules. Yield-co buyers therefore assign a cautious residual value, and sponsors who can show a credible repowering or extension path are rewarded in the bid.

Tariff structure matters too: whether the tariff is fixed in USD terms or VND terms, and whether it escalates, changes the sensitivity to exchange rates.

Tax Leakage and DTA Planning

Tax is where yield-co economics are most often won or lost. The key is to map every cash movement, from plant to yield-co to investor, and to identify each point at which Vietnamese tax can bite.

Vietnamese project companies in renewable power may enjoy corporate income tax incentives for part of the plant’s life, and buyers should confirm how much of the incentive period remains and whether a change of ownership puts it at risk. On exit, the Vietnamese tax on a share sale depends on the type of company being sold and on whether the seller is a foreign organisation.

A sale of shares in a joint stock company is generally taxed on a gross proceeds basis at a low rate, while a transfer of capital in a limited liability company is generally taxed on gain at the standard rate. Indirect transfers through an offshore holdco can also be taxed in Vietnam in specified circumstances. These rules are summarised in general terms and must be verified.

Double tax agreement planning sits alongside this. Treaties with Japan, Singapore and Thailand, among others, can reduce withholding on interest and affect the taxation of capital gains, but only if the yield-co has real substance and meets the beneficial ownership and anti-abuse tests. Vietnam does not levy withholding tax on dividends paid to foreign corporate shareholders, which makes dividend upstreaming into the yield-co relatively efficient.

Large multinational groups should also factor in the domestic minimum top-up tax introduced under the global minimum tax rules. A yield-co tax step plan, agreed before signing, avoids a late price chip.

Frequently Asked Questions

What is a yield-co in the Vietnamese renewable energy context?

It is a holding company that owns operating solar or wind project companies and distributes most of their cash flow to investors. It lets sponsors recycle capital and gives buyers a single, diversified, income-focused platform.

Can a foreign investor buy shares in a Vietnamese power plant company?

Generally yes, because power generation is open to foreign investors, though share purchase registration, competition filing and PPA, licence and lender consents may apply depending on the structure. Confirm requirements for each plant.

Are FiT tariffs safe from retroactive adjustment?

Not automatically. Tariff status for some projects has been questioned, and positions have evolved. Buyers should verify the latest official position, review project-specific commercial operation records and use price protection or indemnities.

What is better for refinancing, bonds or term loans?

Neither is universally better. Term loans are faster and more flexible, while bonds can offer longer tenor and wider investor reach. Security over PPA receivables, foreign exchange rules and EVN consent affect both.

How does tax leakage arise in a portfolio sell-down?

It arises through capital gains tax on share sales, possible indirect-transfer taxation, withholding tax on interest, and the loss of tax incentives. Treaty planning and a documented step plan reduce it.

If you hold or are evaluating operating solar or wind assets, the most useful next step is a short, confidential review of how a yield-co would fit one plant’s PPA, approvals and tax position, so that a sell-down or refinancing can be sized before you approach the market. For regulatory text, see the Ministry of Industry and Trade at moit.gov.vn and the national legal database at vbpl.vn.

This article provides general information only and is not legal, tax or financial advice. Laws and official positions change, and the points above should be verified against current regulations and project facts before any decision is made.