Analysis · Cross-sector lessons · 3 min read
How big should a GPU debt service reserve be?
When DBRS rated Lambda's Compute I loan, it took half a notch off for one reason: the debt service reserve was lighter than the project finance norm. That puts a price on liquidity.
- 01Project finance debt service reserves are often six months of debt service.
- 02Aircraft ABS liquidity facilities cover several interest dates while an aircraft is repossessed and re-leased.
- 03The right size for a GPU reserve is the time it takes to replace a failed customer or operator.
A reserve buys time. It pays debt service while something that has gone wrong is put right. Each asset finance market sizes its reserve for the problem it expects to fix.
Liquidity across asset finance markets
| Market | Liquidity protection | What it covers |
|---|---|---|
| Aircraft leasing and ABS | Liquidity facility covering several interest dates | Interest while an aircraft is repossessed and re-leased |
| Infrastructure project finance | Debt service reserve, often six months | A temporary outage or offtaker payment delay |
| Data centre ABS | Reserves plus a cash trap | Tenant default or lease non-renewal while the space is re-let |
| GPU loans today | Debt service reserves of varying size; DBRS cut Lambda half a notch for a light reserve | No market standard yet |
What problem is a GPU reserve for?
In a GPU loan the most likely problems are a customer that stops paying, an operator that fails or a cluster that loses availability. Each takes time to fix: finding a new customer for the capacity, appointing a replacement manager or replacing failed hardware. The reserve should cover that period.
The 2026 deals show different approaches. Nscale's Ward County structure has a debt service reserve alongside operating, spares and cash trap reserves. DBRS's half-notch cut on Lambda Compute I shows that rating agencies are already testing GPU reserves against the project finance norm, and pricing the difference.
Questions for the next term sheet
- How long would it take to replace the customer on similar terms, and does the reserve cover that time?
- Can the reserve be met with a letter of credit or parent support instead of cash?
- Is the reserve funded at closing or built up from cash flow, and what happens in the gap?
- Does the reserve target fall as the loan amortises?
For in-house counsel
Take it to the documents
The filed wording behind this piece, for the lender’s or the borrower’s side. Previews are open; the full text is free with InfraCompute Weekly.
- Contract libraryGPU contracts, leases, power, equity and JVs, quoted from filed contracts.
- Financing clause libraryCash traps, coverage ratios, cures and step-in, from the filed deals.
- Issues list builderBuild an issues list from the lender’s or the borrower’s side.
- The legal desk for in-house counselEverything for counsel in one place.
