There is one international school in Hong Kong where the right to nominate your child for admission costs HK$20 million.

That is not a translation error. Twenty million Hong Kong dollars. At current exchange rates, approximately £2 million. The product is called the Golden Jubilee Debenture, launched in 2026 by Kellett School to mark the school’s 50th anniversary. It is, as the school’s website explains with notable directness, “designed specifically for major global corporations in Hong Kong who know that a first-class international education is of paramount importance to C-Suite executives with families.”

For HK$20 million, a corporation can nominate up to three children at any one time. The children get the highest admission priority the school offers. The debenture has an indefinite lifespan, no redemption, and no resale value. The school keeps the money. The corporation reserves the right to send the next generation of its executive families through Kellett’s classrooms.

This is the most expensive school admission right on sale anywhere in the world. And it is one feature of a system that has quietly become the strangest fee structure in global education.

This is the Hong Kong debenture economy. Today we explain how it works, who pays, where the money goes, and why a US church group is now suing one of the schools for amassing HK$2.8 billion in reserves while allegedly serving only “the rich and privileged few.”

What a debenture actually is

For readers outside Hong Kong, the word “debenture” sounds like a financial instrument from a Victorian novel. It almost is.

In Hong Kong international schools, a debenture is a large upfront capital payment that parents (or corporations) make in addition to annual tuition fees. In exchange, the debenture holder receives priority admission rights, fast-track waitlist treatment, or in some cases guaranteed assessment slots for the nominated children.

There are several variations, with different commercial logics behind each one.

Mandatory debentures are required for admission. No debenture, no school place. Most Hong Kong international schools used to operate this way. The mandatory model is now in retreat, with most schools transitioning to optional debenture structures or annual capital levies. Kellett, the school with the £2 million Golden Jubilee Debenture, eliminated its mandatory debenture requirement for new admissions from 31 August 2025, replacing it with an annual capital levy paid by all families.

Optional debentures are sold to parents or corporations who want priority over the standard waitlist. They are not required to attend, but in practice the standard waitlist for popular schools is so long (sometimes 500+ applicants for 100 places at Year 1 entry) that debentures have become the only realistic way to secure admission within a useful timeframe.

Capital certificates are typically lower-priced versions of debentures, sometimes with shorter lifespans or fewer rights. They sit between debentures and annual capital levies in the pricing hierarchy.

Annual capital levies are recurring non-refundable fees charged on top of tuition. Currently HK$60,000 per year at Harrow Hong Kong. HK$38,000 for ESF schools in Year 1 (decreasing on a sliding scale). These are the new normal as mandatory debentures fade out, but they don’t replace debentures, they sit alongside them as a base layer that all families pay.

The schools justify these structures by pointing to their non-profit status, the absence of government funding, and the need to finance capital projects (new buildings, sports facilities, technology upgrades) without taking on bank debt. The justification is partially valid. The implementation, as we’ll see, has produced some structures that test the limits of what “non-profit” should mean.

The Hong Kong debenture landscape, by school

Here’s where the data gets striking. The 2026 Hong Kong international school debenture pricing, by major school:

Kellett School (British, not-for-profit, founded 1976)

  • Golden Jubilee Debenture: HK$20,000,000 (around £2 million), non-redeemable, up to 3 children, indefinite lifespan
  • Foundation Debenture: HK$10,000,000 (around £1 million), 15-year life with possible 10-year extension, redeemable at par
  • Corporate Debenture: HK$1,000,000 (around £100,000), 8-year life, depreciable
  • Foundation Certificate: HK$500,000 (around £50,000), priority rights without resale
  • Annual Capital Levy (new): payable by all new families post-August 2025

Chinese International School (CIS, founded 1983)

  • 2026 Corporate Nomination Right: HK$15,000,000 (around £1.5 million), non-refundable, depreciates to zero over 5 years
  • Golden CNR: HK$10,000,000
  • Capital Debenture: HK$2,200,000 (exempts holder’s child from annual capital levy)

Harrow International School Hong Kong (founded 2012)

  • Original individual debenture batch: HK$600,000, fully subscribed, no new individual debentures issued
  • Capital Certificates and Debentures: range up to HK$10,000,000
  • Annual Capital Levy (mandatory for non-debenture-holding families): HK$60,000 per year per pupil

German Swiss International School (GSIS)

  • Infrastructure Debenture: HK$6,000,000 (around £600,000), grants “First Admissions Priority” equal to German/Swiss/Austrian passport holders

Hong Kong International School (HKIS, American, founded 1966)

  • Capital Note (Direct): HK$6,500,000
  • Capital Note (Secondary market): around HK$4,300,000
  • Currently subject to a lawsuit from co-founder Lutheran Church-Missouri Synod (more on this below)

English Schools Foundation (ESF)

  • Individual Nomination Right: HK$500,000 (around £50,000)
  • Annual Capital Levy: HK$38,000 in Year 1, sliding scale down

French International School (FIS)

  • Corporate Debenture: HK$250,000 (around £25,000)

Most other international schools

  • Debenture range: HK$100,000 to HK$5,000,000
  • Annual capital levies: HK$25,000-HK$60,000

The 2026 cost of accessing a top Hong Kong school

Let’s translate this into a single number that a British family can understand.

Suppose you want to send a child to a top-tier Hong Kong international school, starting at Year 1, for the full 13-year education through to Year 13. You have a few options.

Option A: Pay the optional debenture for priority admission

Take Kellett as the example. To access the highest admission priority via the Foundation Debenture, you pay HK$10 million upfront. That’s around £1 million. The debenture is redeemable at par after 15 years. If we assume the value of that money sitting elsewhere (in a UK ISA returning 5% compound, conservatively) would have grown to roughly £2 million over the same 15 years, the opportunity cost of the debenture is approximately £1 million.

Add annual tuition at around HK$255,000-HK$310,000 (£25,000-£31,000) per year for 13 years. That’s roughly £325,000-£400,000 in fees over the full education.

Total cost of one child’s education at Kellett with priority Foundation Debenture: roughly £1.3-1.4 million in real terms.

Option B: Pay the annual capital levy and wait

You apply through the standard process. You may or may not get in. The Year 1 waitlist at popular schools regularly exceeds 500 applicants for 100 places, so realistic chances are roughly 1 in 5 for any given top-tier school. If you get in, you pay the annual capital levy (HK$30,000-HK$60,000) on top of tuition every year.

Total cost over 13 years if you succeed without a debenture: roughly £400,000-£500,000 per child, but with a meaningful probability of not getting a place at all.

Option C: Pay a smaller debenture (Corporate or equivalent)

At Kellett’s HK$1 million Corporate Debenture level, or HK$500,000 ESF Individual Nomination Right, you get accelerated waitlist treatment but not guaranteed top priority. The maths is similar to Option A but at smaller scale.

Total cost: roughly £450,000-£600,000 per child in real terms.

These numbers, for one child’s primary-and-secondary education at a Hong Kong international school, dwarf the cost of any other education system on the planet. They represent the most expensive education available outside of bespoke private tutoring arrangements. And they have grown faster than any other education cost over the last 20 years.

The “Million Dollar Seat” and the 2026 inflation

There is now an entire admissions consulting industry in Hong Kong dedicated to navigating this market. One consultancy, with characteristic local directness, calls it the “Million Dollar Seat.”

The trend identified by these consultants in 2026 is unmistakable. Debenture prices have inflated dramatically at the top tier. The new Kellett Golden Jubilee at HK$20 million and the CIS Corporate Nomination Right at HK$15 million both represent significant step-changes from prior pricing. Ten years ago, the same admission priority would have cost HK$600,000 to HK$2 million. Today, the equivalent products are five to ten times the price.

The driver is straightforward. Demand for top-tier Hong Kong international school places has consistently outstripped supply for at least 15 years. Mainland Chinese families, increasingly wealthy Hong Kong locals, and expatriate corporate executives all compete for the same limited pool of seats. The schools have responded the way any business with pricing power responds. They’ve raised prices.

The 2026 development that worries some industry observers is the move from tradeable debentures to non-refundable nomination rights. The CIS Corporate Nomination Right depreciates to zero over five years. The new Kellett Golden Jubilee is non-redeemable indefinitely. The “asset” you’re buying has become a pure service fee with no residual value.

In the old debenture model, a family that paid HK$2 million for a Foundation Debenture would, at the end of their child’s education, get HK$2 million back (or could sell the debenture to another family). In the new model, the same HK$15 million payment is gone, depreciated to zero, with nothing to redeem. The schools have stopped pretending these are investments. They are now openly priced as luxury access fees.

The HKIS lawsuit: where this is heading

In September 2025, something happened in Hong Kong that has not received nearly the attention it deserves outside the local market.

The Lutheran Church-Missouri Synod, the US-based church that co-founded Hong Kong International School in 1966, filed a lawsuit against HKIS’s operating company. The Church alleged that HKIS had breached its operating agreement, drifted from its founding mission, and was now serving only “the rich and privileged few.”

The most explosive number in the lawsuit: HKIS had allegedly amassed HK$2.8 billion in financial reserves (around US$359 million, £282 million), far in excess of what the Church considered reasonable for a not-for-profit school.

HKIS rejected the allegations as “false or irrelevant” and said it remained committed to supporting the international business community.

The lawsuit is significant because it makes visible something that has been an open secret in Hong Kong for years. The not-for-profit international schools have been generating substantial surpluses, accumulating large financial reserves, and operating with limited transparency about how those reserves are used. HK$2.8 billion at one school is not a small operating buffer. It is institutional capital on a scale that suggests the surplus from fees and debentures over decades has far exceeded what the school needed for actual capital projects.

This question, what these schools are actually doing with the money, has been asked quietly by parents and teachers for years. The HKIS lawsuit puts it on a court record.

The implications, if the lawsuit progresses or other schools face similar challenges, are significant. Regulatory scrutiny of the Hong Kong debenture system has been minimal, with the Education Bureau largely treating these as commercial arrangements between schools and parents. That posture may not survive a high-profile court case involving HK$2.8 billion in reserves at one of the city’s most prestigious schools.

What this means for British parents

Most British families in Hong Kong, or considering a move there, will never pay a HK$20 million debenture. The Kellett Golden Jubilee is targeted at investment banks and global corporations relocating C-Suite executives. It is not a normal family product.

But every British family with children in Hong Kong international schools is paying into this system in some form. The annual capital levies (HK$30,000-£60,000 per child per year) are the base layer. The optional debentures, even at the smaller end (HK$500,000-£1 million), are what realistic admission to a top school often requires for families who can afford them.

The cumulative effect, across a 13-year Hong Kong international school education for two children, is a total cost of HK$8-15 million (£800,000-£1.5 million) for an upper-middle-class British expat family. This is the most expensive education product in the world, and most families pay it because the alternatives (local Hong Kong schools, distant boarding schools in the UK, less-prestigious international schools) carry their own significant costs and trade-offs.

The structural critique here is the same as in earlier pieces in this pillar. An education system that requires £1 million in capital contributions for two children to attend high-quality schools has become an asset-class economy, not an educational one. The fact that some of these schools are technically “not-for-profit” does not change the economic reality. The surplus accumulates somewhere. At HKIS, the lawsuit alleges, it has accumulated to HK$2.8 billion while the school’s mission has drifted.

What parents can actually do

If you are considering Hong Kong as a destination, or already there with children approaching school age, three practical recommendations follow from the data.

One: model the true 13-year cost before committing.

The marketing materials of Hong Kong international schools emphasise the annual tuition fee. The annual capital levy gets mentioned in the fee schedule but rarely highlighted. The optional debenture system is usually relegated to a separate “admissions” page. The full cost is not the tuition. It is tuition + capital levy + debenture (or debenture opportunity cost) + entrance fees + assessment fees + uniform + technology + trips. Build the full model. The numbers are striking.

Two: distinguish between mandatory and optional structures.

ESF schools, increasingly, do not require debentures. The Annual Capital Levy is the main extra cost. ESF is significantly more accessible than the elite British international schools and has produced excellent results historically. For most British families, ESF is the right answer, not Kellett or Harrow.

Three: ask what reserves the school holds and what they’re for.

This question rarely gets asked because it sounds rude. After the HKIS lawsuit, it shouldn’t sound rude anymore. A not-for-profit school holding HK$2.8 billion in reserves while requiring £1 million debentures from new families is operating a model that deserves scrutiny. If a school refuses to discuss its reserves, that is information.

The takeaway

The Hong Kong debenture system is the most extreme manifestation of a global trend we’ve covered in this pillar. International school education has become a luxury service product, priced by what wealthy parents will pay, structured to capture as much value as possible from families who feel they have limited alternatives.

The £2 million Kellett Golden Jubilee Debenture is the headline number. The HK$60,000 annual capital levy at Harrow is the everyday one. The HK$2.8 billion in reserves at HKIS is the question hanging over the whole system.

These structures did not exist in their current form 20 years ago. They have grown because schools could grow them, because parents could pay, and because regulatory oversight has been minimal.

The Lutheran Church lawsuit against HKIS may turn out to be the first significant challenge to the system. It may also be the start of a wider conversation about whether “not-for-profit” can mean very different things in practice.

In the meantime, British families considering Hong Kong should go in with eyes open. The total cost of educating two children at a top Hong Kong international school for 13 years each is roughly £800,000-£1.5 million in real-terms expenditure. That is more than most British families’ total housing wealth over a lifetime.

If you are paying it, ask what you’re getting and where the money goes. The schools, increasingly, will tell you. Or they’ll be made to.

In tomorrow’s piece in this pillar, we turn from cost structures to teacher quality, what happens when great teachers leave the international circuit, where they go, and what it means for the schools they leave behind.