Venture debt is a term loan for venture-backed companies, usually sized at a fraction of the last equity round, with an interest-only period, then fixed amortization, plus warrants that give the lender a small slice of equity. Revenue-based financing (RBF) is an advance repaid as a fixed percentage of monthly revenue until you have paid back a cap, typically 1.3x to 1.5x the amount funded, with no warrants. Venture debt is usually cheaper on paper but rigid; RBF flexes with revenue, and its effective annual cost rises the faster you grow.
This is general education, not financial, legal or accounting advice. Term ranges below are published typical ranges with dates, not quotes; your offer will depend on your metrics, your investors and the market.
Most pages that rank for this comparison are written by lenders selling one of the two products. This guide has nothing to sell on the financing side. It explains how each instrument works, converts both into the same yardstick (an effective annual rate plus dilution), puts equity next to them, and shows what each does to your cash runway, using one worked example where every number is computed, not estimated.
How venture debt works
Venture debt is a senior or near-senior term loan offered to companies that have recently raised equity from institutional investors. The lender underwrites less on your cash flow and more on the likelihood that your investors will fund the next round. That is why it typically arrives right after a priced round, and why it is rarely available to a company that has never raised.
Published ranges from lenders and their filings, with dates:
| Term | Typical published range | Source |
|---|---|---|
| Loan size | 20% to 50% of the previous venture round | Mercury, venture debt term sheet guide (updated Feb 2026) |
| Interest rate | Usually floating off Prime: light-covenant loans often Prime + 3-4% (10-14% total), heavy-covenant loans Prime + 1-3% (5-8% total) | Mercury (Feb 2026) |
| Interest-only period | 12 to 18 months (Mercury); 3 to 18 months or longer (Hercules Capital) | Mercury; Hercules Capital 10-K, FY2025 |
| Maturity | 3 to 5 years (Mercury); typically 36 to 48 months (Hercules) | Mercury; Hercules 10-K FY2025 |
| Warrant coverage | 3% to 20% of principal, strike at the latest round price (Hercules); 2% to 10% (Kruze Consulting, 2024); 0-5% heavy covenant vs 10-20% light covenant (Mercury) | As listed |
| Fees | Arrangement fee usually up to 1%, back-end fee usually up to 1% (SVB guidance); exit fees of 3.5% to 4.95% appear on several software loans in Hercules' FY2025 schedule of investments | SVB; Hercules 10-K FY2025 |
For context on price level: Hercules Capital, a listed venture lender, reported a weighted average effective yield of 12.9% on its debt investments for Q4 2025, with Prime at 6.75% at year end. That is a lender's portfolio yield for mostly later-stage companies, not a quote, but it anchors where the market was.
Interest-only, then amortization
The structure matters more than the headline rate. During the interest-only (IO) period you pay only interest, so cash out is small. When amortization starts, every month includes principal and the payment can jump three or four times. Mercury's own example is a 4-year loan with a "12 months/36 months amortization structure": one year IO, three years of principal plus interest. Many founders model the IO year and forget the step-up, which tends to land right when the next raise is supposed to happen.
Warrant coverage, in plain numbers
Warrant coverage is expressed as a percentage of the loan amount, converted into shares at a strike price, usually the price of your most recent round.
Warrant shares = (Loan amount × Coverage %) ÷ Strike price per shareDilution ≈ warrant value at strike ÷ post-money valuation
So 8% coverage on a $2M loan is $160,000 of stock at the last round price. If your last post-money valuation was $25M, that is about 0.64% of the company. Small, but not zero, and it is the part of the cost that grows with your success. Run your own numbers in the dilution calculator or see where it lands on the cap table.
Covenants and the MAC clause
Hercules' 10-K lists the covenants its loans may include: cross-default, material adverse change (MAC) provisions, periodic financial reporting, minimum liquidity requirements, and limits on taking more debt or selling assets. The same filing says traditional bank lenders often impose restrictive conditions, including "requiring a significant depository relationship". The MAC clause is the one founders underestimate: it lets the lender declare a default if it judges your business has materially deteriorated, even if you have not missed a payment.
How revenue-based financing works
With RBF, a provider advances capital and you repay a fixed percentage of each month's revenue until total payments reach an agreed cap. There is no fixed amortization schedule, and most providers take no warrants.
- Repayment cap: Lighter Capital's FAQ says its cap "varies between 1.3-1.5X the funded amount depending on the health and stage of your business."
- Term: Lighter says its terms are "typically 3 years", and its product page describes terms from one to five years.
- Eligibility: Lighter requires recurring revenue of "at least $15K a month or $200K a year, and growing", and advances up to $4M upfront.
- Prepayment: the cap is owed in full whenever you repay. Lighter states there is "generally no incentive for paying back an RBF loan early."
- Covenants: typically light. Lighter says its terms carry no "restrictive covenants, or personal guarantees".
The percentage of revenue you remit is negotiated per deal. We could not find a primary source publishing a standard range, so the example below uses an explicitly illustrative rate.
The third option: ARR-based lines
Between the two sits recurring-revenue lending, where the borrowing limit is a multiple of monthly recurring revenue. SaaS Capital, a lender in this category, describes its facilities as "typically 4x to 7x MRR" for companies "above $3 million in ARR", drawn over two years then repaid over three, and puts SaaS-focused bank lines at "2x to 4x MRR". Treat these as one lender's description of its own market. The useful part: borrowing capacity grows with your ARR, and so does the debt.
Side-by-side comparison
| Venture debt | Revenue-based financing | Equity | |
|---|---|---|---|
| Who qualifies | Venture-backed, recently raised | Recurring revenue, growing; no VC needed | Investors who believe in the upside |
| Size driver | Last round size | Revenue / ARR | Valuation and round size |
| Repayment | IO period, then fixed amortization | % of revenue until cap is reached | None |
| Dilution | Warrants, usually under 1% of the company | Usually none | Full round dilution |
| Cost drivers | Rate, fees, final payment, warrants | Cap multiple and speed of repayment | Ownership given up × future value |
| Downside behavior | Fixed payments, covenants, MAC | Payments fall with revenue, cap still owed | No repayment; investors share the loss |
Worked example: the same $2M, three ways
All inputs are illustrative, chosen to sit inside the published ranges above. A SaaS company has $5M ARR (MRR $416,667), $3M cash, $250K monthly net burn, and a last post-money valuation of $25M. It needs $2M. Every figure below was computed in Python, including the internal rate of return (IRR) used for the effective annual cost.
Option A: venture debt
- $2M term loan, 48 months: 12 months interest-only, then 36 months amortizing
- 11% fixed rate (real loans usually float; fixed keeps the math readable)
- 1% upfront fee ($20,000), 3.5% final payment ($70,000)
- 8% warrant coverage at the $25M post-money price
Interest-only payment: $2,000,000 × 11% ÷ 12 = $18,333 per month. Amortizing payment from month 13: $65,477 per month for 36 months. Total interest is $577,188; adding the fee and final payment, the loan costs $667,188 on top of principal.
Solving for the rate that makes the cash flows net to zero (you receive $1,980,000, then pay the schedule) gives an effective annual cost of 13.2%. Fees and the final payment add about 2 points to the 11% headline.
Now the warrants: $160,000 of stock is about 0.64% of the company. If the company is worth 3x its last post-money at exit, those warrants are worth $480,000, or $320,000 after the lender pays the $160,000 exercise price. Count that value as a cost paid in month 48 and the effective annual cost rises to 17.7%. If the company exits flat, the warrants are worth roughly nothing and the cost stays near 13.2%.
Option B: revenue-based financing
- $2M advance, 1.4x cap (total repayment $2.8M)
- Remittance of 10% of monthly revenue (illustrative)
The first payment is 10% × $416,667 = $41,667. Total cost is always $800,000. What changes is how fast you pay it, and that decides the effective rate:
| Revenue growth (monthly) | Months to repay | Effective annual cost (IRR) | Payment in month 24 |
|---|---|---|---|
| 0% (flat) | 68 | 13.4% | $41,667 |
| 2% | 44 | 18.4% | about $66,000 |
| 4% | 34 | 22.5% | $102,696 |
This is the RBF paradox: the better the business does, the more expensive the money becomes, because the same $800,000 fee is paid over a shorter period. At 4% monthly growth, year-two payments total $1,002,367, roughly double year one. SaaS Capital, which competes with RBF providers, claims the IRR on most RBF loans falls into the 20% to 40% range; our growth cases land at the low end of that. Lighter Capital argues the cap should not be read like an APR because it is a flat fee. Both points are fair: the cap tells you the total, the IRR tells you the price of time.
Note the flat case: 68 months is far longer than the three-year terms providers describe, so a company with no growth would likely be offered a higher remittance rate or a lower cap amount in practice.
Option C: equity
Raise $2M at a $25M pre-money valuation: dilution is $2M ÷ $27M = 7.41%. No monthly cash out. The cost is the future value of that ownership. If the company is worth $75M in four years, the 7.41% is worth $5.56M, an implied 29.1% per year on the $2M. If it is worth $25M, the stake is worth $1.85M and equity was the cheapest money of the three. See how valuation drives this in our SaaS valuation guide.
What each option does to runway
Holding net burn flat at $250K a month to isolate the financing effect, starting runway is 12.0 months:
| Option | Cash added | Monthly financing outflow | Runway |
|---|---|---|---|
| No financing | $0 | $0 | 12.0 months |
| Equity | $2,000,000 | $0 | 20.0 months |
| Venture debt | $1,980,000 | $18,333, then $65,477 from month 13 | 17.6 months |
| RBF, flat revenue | $2,000,000 | $41,667 | 17.1 months |
| RBF, 4% monthly growth | $2,000,000 | $41,667 rising to $64,144 by month 12 | 16.3 months |
The same $2M buys about 8 months as equity but only 4 to 5.6 months as debt, because repayments start immediately. Debt extends runway; it does not extend it dollar for dollar. If your plan depends on reaching a milestone in month 19, only one of these options gets you there at current burn.
The downside case: what happens when things go wrong
Venture debt: fixed payments and lender discretion
If revenue stalls, the amortization schedule does not. If cash falls below a minimum liquidity covenant, or the lender invokes a MAC clause, it can accelerate the loan. Venture debt works best as insurance on a plan that is already funded, not as a bridge to a round you are not sure you can raise. Check your burn multiple before borrowing: debt on top of inefficient growth shortens your options.
RBF: payments fall, the obligation does not
If revenue drops, the monthly remittance drops with it, which is real relief. But the cap is still owed in full, so the obligation stretches out, and a revenue share taken off the top of a shrinking business can crowd out the spend needed to recover.
SVB, March 2023: concentration risk
The Federal Reserve's April 2023 review of Silicon Valley Bank records that deposit outflows "were over $40 billion on March 9, and management expected $100 billion more the next day", and that California regulators closed the bank on March 10. About 94% of SVB's deposits were uninsured at year-end 2022, and the bank described itself as serving "nearly half" of U.S. venture-backed technology and life sciences companies. On March 12, a joint statement by the Treasury, the Federal Reserve and the FDIC said depositors would have access to all of their money from March 13.
The lesson for borrowers is structural, not about one bank. When your lender is also where your operating cash lives (a common bank-lending condition, per the Hercules filing above), a problem at the lender becomes a problem with your payroll. The backstop was a policy decision made over a weekend, not a contract term. When negotiating, ask whether you can hold operating cash at more than one institution, and model what happens to your covenants if you move money.
Who qualifies for what
- Venture debt: companies backed by institutional investors, ideally within months of a priced round. The lender is underwriting your investors' willingness to fund you. If you are working through your term sheet now, that is the moment to ask about debt.
- RBF: companies with predictable recurring revenue, including bootstrapped ones. Size is capped by revenue, so it suits smaller amounts relative to ARR.
- ARR-based lines: companies with meaningful ARR and solid retention, where the limit scales with MRR.
- Equity: when the plan needs long runway before cash flow, or when repayments would starve growth. Our SaaS fundraising guide and the SAFE vs convertible note comparison cover the equity side.
How to model debt and RBF in your forecast
Financing decisions belong in the operating model, not a separate spreadsheet tab nobody updates. The chain runs driver, P&L, cash:
- Revenue drivers drive the RBF schedule. RBF remittance is a percentage of revenue, so link it to the revenue line, not to a fixed amount. When you change a growth assumption, both runway and the effective cost move together. This is the only way to see the paradox in your own numbers.
- Debt has two homes. Interest (and amortized fees) hits the P&L below operating income, so EBITDA is unchanged. Principal repayment never hits the P&L at all; it only shows up in cash flow from financing. Forecasts that model "debt payments" as an operating expense overstate losses and understate the cash cliff at the end of the IO period.
- Put the IO step-up on a calendar. Mark the month amortization starts against your net burn and your next-raise date.
- Model covenants as tests. If the loan has a minimum cash covenant, add a row that flags the first month projected cash breaches it. That month, not cash zero, is your real deadline.
- Run downside scenarios. Compare base, slower growth and no-raise cases. The scenario tool and runway calculator show the shape quickly.
In Adlega, the driver-based model carries revenue through to a 36-month cash forecast, so a financing line tied to revenue updates when the drivers do, and the AI CFO can trace any runway figure back to the formulas behind it. Whatever tool you use, the principle is the same: model financing from the cash flow forecast, not from the lender's pitch deck.
Common mistakes
- Comparing headline rate to cap multiple. An 11% rate and a 1.4x cap are not comparable until you put both on the same timeline. Use IRR.
- Calling venture debt "non-dilutive". Warrants are dilution. Small, but real, and largest when you succeed.
- Ignoring the amortization cliff. The IO year flatters runway; the step-up arrives later.
- Assuming RBF gets cheaper with growth. The total is fixed, so faster growth raises the annualized cost.
- Borrowing to reach a round you have not de-risked. Debt shortens runway relative to equity of the same size and adds a creditor with acceleration rights.
- Treating principal as an expense. It distorts your P&L and hides the cash timing.
- Missing the deposit and covenant terms. Where you must hold cash, and what triggers default, matter as much as price.
FAQ
What is the difference between venture debt and revenue-based financing?
Venture debt is a term loan with a fixed schedule, interest, fees and usually warrants, available mainly to venture-backed companies. RBF is repaid as a share of monthly revenue until a fixed cap is reached, usually without warrants, and does not require VC backing.
Is revenue-based financing a loan?
Economically it behaves like debt: you receive cash now and owe a defined total later. Providers structure and describe it in different ways, and the legal and accounting treatment depends on the contract, so ask your accountant how a specific agreement should be recorded.
What happens with RBF if revenue drops?
Your monthly payment falls because it is a percentage of revenue, but the total cap is still owed, so repayment takes longer.
What is warrant coverage in venture debt?
The value of stock the lender can buy, expressed as a percentage of the loan amount, at a strike price usually equal to your latest round price. Hercules Capital reports coverage of 3% to 20% of principal; Kruze Consulting cites 2% to 10%.
How much venture debt can a startup raise?
Mercury puts typical size at 20% to 50% of the previous venture round. A company that raised $5M might see a $1M to $2.5M offer, per Mercury's example.
Do I need venture capital to get venture debt?
Generally yes. Lenders underwrite the likelihood that existing investors will keep funding the company. Companies without institutional backing usually look at RBF or revenue-based lines instead.
What covenants come with venture debt?
Common ones include minimum liquidity, reporting requirements, limits on additional debt and asset sales, cross-default and material adverse change clauses, per Hercules Capital's FY2025 10-K. Bank lenders may also require you to keep deposits with them.
Is venture debt cheaper than equity?
If the company grows strongly, usually yes, because equity's cost is a share of a much larger future value. If the company stalls, equity can be cheaper, since it never has to be repaid. In our example, debt cost 13% to 18% a year, while equity's implied cost ranged from roughly zero to 29% a year depending on exit value.
Before choosing, put all three options into your forecast and compare runway, monthly cash out and dilution side by side. Your existing investors and a venture capitalist on your board should see that comparison too.