How Much Debt Your ARR Can Actually Support

A traditional debt capacity model sizes borrowing against a multiple of EBITDA, on the logic that EBITDA approximates the cash flow available to service debt. Growth-stage SaaS companies frequently show low or negative EBITDA on purpose, reinvesting aggressively in sales and product rather than optimizing for near-term profitability, which makes an EBITDA-based capacity estimate close to meaningless even for a genuinely healthy, well-run business. Lenders serving this segment have adapted by sizing against ARR instead, treating recurring revenue itself as the proxy for durable cash flow that EBITDA would otherwise represent.

Start with your current annual recurring revenue and apply a multiple, but treat that multiple as a range rather than a fixed number, since lenders adjust it meaningfully based on the quality of the revenue behind it, not just its size. Two companies with identical ARR can receive very different debt capacity offers depending on growth rate, margin structure, and how much of that revenue is at risk of churning, which is exactly why a single generic multiple isn't a useful planning number on its own.

For example, picture two SaaS companies with the same ARR. The first retains nearly all of its revenue base and adds new ARR efficiently; the second loses a large share of customers each year and burns heavily to replace them. A lender is likely to offer the first a higher multiple and a lower rate, even though a size-only view treats the two as identical. The practical takeaway is to improve retention and burn efficiency before approaching lenders where you can, and to present those metrics up front instead of waiting for a lender to find them in diligence. Lead with the strongest evidence that your revenue is durable.

Gross margin sets a ceiling on how much cash flow is even available to service debt after cost of revenue, so a company with a thinner gross margin¹ has less room to add fixed debt payments on top of its expenses than one with a richer margin profile at the same revenue size. Net revenue retention matters just as much: a lender modeling debt capacity against your ARR is really betting that the revenue backing today's number is still there next year, and a business losing a large share of its base annually is a much riskier multiple to lend against than one retaining nearly all of it.

Your burn multiple, net burn divided by net new ARR, tells a lender something an ARR multiple alone doesn't: whether the business is generating that revenue efficiently or spending heavily to get there². A company adding debt service on top of a burn multiple that's already stretched thin is asking new fixed payments to compete with cash the business is already burning through faster than it's replacing, which is exactly the combination that turns a manageable loan into a covenant problem within a year.

Before a lender gives you their number, build your own: list current ARR, gross margin, net revenue retention, and burn multiple side by side, then ask honestly whether adding a specific amount of new fixed debt service would still leave comfortable headroom under a conservative growth case, not just your best-case forecast. If the honest answer is that debt service only works if growth and retention both hold up exactly as planned, the amount you're considering is probably larger than your business can safely support right now, regardless of what a lender is willing to offer.

Rerun this worksheet before every renewal or expansion of an existing facility, not only the first time you borrow. A business that comfortably supported a given amount of debt a year ago can find the same amount uncomfortable after a slower growth quarter or a dip in retention, even if the lender's own number hasn't changed.

Work through it in this order:

1. List your current ARR, gross margin, net revenue retention and burn multiple side by side on a single page.
2. Apply a range of multiples rather than one number, since lenders adjust the multiple for the quality of the revenue behind it.
3. Test whether a specific amount of new fixed debt service leaves comfortable headroom under a conservative growth case, not just your best case.
4. Treat the amount as too large if debt service only works when growth and retention both hold exactly as planned.
5. Rerun the exercise before every renewal or expansion of an existing facility, not only the first time you borrow.