Venture debt looks cheap at its 11-12% coupon, but the all-in effective rate runs roughly 15% per year once you stack origination fees, a 3-6% final payment, warrant cost, and prepayment penalties. On a worked $5M facility exited in year three, the true cost lands near 15.3%, about 380 bps above the headline.
Founders weighing a term sheet usually compare the coupon to a mortgage and call debt the cheap option. The coupon is only the first of four separately negotiated cost components. Below, venture debt, revenue-based financing, and equity sit side by side on true cost, then we build the venture-debt number and read it through cvffund's EBITCAC lens.
Which is actually cheapest: venture debt, RBF, or equity?
Start with the comparison, because the answer reframes everything. Each instrument hides its price in a different place. Venture debt buries it in fees and warrants. RBF buries it in a repayment cap that, when you repay fast, compresses into a punishing annualized rate. Equity buries it in dilution that compounds.
| Instrument | Headline price | True all-in cost | Where the cost hides |
|---|---|---|---|
| Venture debt | Coupon SOFR + 6-9% | ~15% effective (worked below) | Origination + 3-6% final payment + warrants + prepayment |
| Revenue-based financing | Repayment cap 1.1x-1.5x advance | 15-40% effective APR | Fixed cap compresses; fast repayment raises APR |
| Equity | "No interest" | ~50% over one year on a fast-appreciating round | Dilution compounds; VC return target |
The RBF anchor is sharp: because a 1.1x-1.5x cap is a fixed premium, repaying it quickly raises the effective rate. A 1.25x cap repaid in 12 months can exceed 40% APR. That drag is covered in the RBF gross-margin threshold piece and the structural RBF vs venture debt comparison.
Equity is in another league. A $10M raise at a $100M post-money valuation that is worth $150M a year later hands investors a stake worth $15M for the $10M they put in, an effective cost of capital near 50% for that single year. And dilution stacks multiplicatively: a 20% round followed by another 20% round leaves 64% remaining, not 60%. Series A funds underwrite to 10-15x returns with 20-35% target IRRs, the price your equity carries even when no one quotes a rate. The full trade-off is in our venture debt vs equity guide.
So venture debt is genuinely the cheapest of the three. The question is by how much, and whether the gap justifies the covenants and the lien. That depends on the all-in rate, not the coupon.
What goes into the venture-debt coupon?
The coupon is a floating rate. Market pricing in early 2026 runs SOFR + 6-9%, and with SOFR around 4.5% that lands at roughly 10.5-13.5% nominal, with 10-13% typical for stronger borrowers. Institutional lenders price a tighter 400-600 bps over SOFR. Bank-tier paper looks even gentler: Kruze's representative term sheet sets WSJ Prime + 1.00% with a 5.75% floor.
That floating coupon is the part founders fixate on. It also understates the true cost the most, because three further charges sit on top of it and none show up in the headline number.
What are the hidden fees beyond the coupon?
Four cost components are negotiated separately, and only the first is the interest rate. Advisors put it plainly: the true cost extends far beyond the quoted interest rate.
The origination fee is deducted from proceeds, so you pay interest on dollars you never received. It typically runs 1-2% of the facility; Kruze's sample charges 0.50% at closing. This is a form of original issue discount.
The final payment, or back-end fee, is the quiet killer. It is 3-6% of the loan paid as a lump sum at maturity or early repayment, on top of principal. Kruze's term sheet sits at the top of that range: 6.00% of the advanced amount.
The warrants are the equity kicker. Banks typically require warrant coverage of 1-2% of the loan facility; specialized funds take 2-20%. In fully diluted terms that is usually 1-2% ownership transferred to the lender. Houlihan Lokey treats this kicker as synthetic OID added to the explicit OID: a $100M facility with 2.0% explicit and a 3.0% warrant kicker is really priced to a $95M issue. For the mechanics on their own, see our warrants and dilution deep-dive.
The prepayment penalty punishes the exact moment a healthy company wants out. It runs 1-3% if you repay more than six months early; Kruze tiers it at 3% in year one, 2% in year two, 1% thereafter.
How do you compute the all-in effective rate? (worked example)
Take a real structure. A $5M facility, 4-year maturity, 12 months interest-only then 36-month amortization, coupon at SOFR + 7.0% (the same spread BIWS uses in its model), so an 11.5% headline. Closing fee 0.50%, final payment 6.00%, warrants valued at 2% of principal, and the borrower refinances at the end of year three, paying the 1.00% prepayment tier.
| Cost line | Calculation | Amount |
|---|---|---|
| Year 1 interest (IO on full $5.0M) | $5,000,000 x 11.5% | $575,000 |
| Year 2 interest (avg balance $4.17M) | $4,166,667 x 11.5% | $479,167 |
| Year 3 interest (avg balance $2.5M) | $2,500,000 x 11.5% | $287,500 |
| Closing fee (OID) | 0.50% x $5,000,000 | $25,000 |
| Final payment | 6.00% x $5,000,000 | $300,000 |
| Warrant value (synthetic OID) | ~2% x $5,000,000 | $100,000 |
| Prepayment fee (year-3 tier) | 1.00% x $1,666,667 outstanding | $16,667 |
| Total all-in cost | $1,783,333 |
The interest alone is $1,341,667. The non-coupon stack adds $441,667, which is 8.8% of principal and about 25% of total cost. A quarter of what you pay never appears in the coupon.
Now convert to a rate. Dividing by the full $5M is dishonest, because the loan amortizes down. The right denominator is the average capital actually outstanding: the blend of yearly averages is ($5,000,000 + $4,166,667 + $2,500,000) / 3 = $3,888,889. The effective annualized cost is $1,783,333 / ($3,888,889 x 3) = 15.3% per year.
That is roughly 380 bps above the 11.5% coupon. The instrument marketed as cheap, non-dilutive capital costs nearly four points more than the rate on the term sheet.
The direction checks out independently. BIWS's own model lands at a 12.4% IRR and 1.4x MOIC on a 10-11% average coupon, with fees and warrants lifting the return above the rate. Realized named-lender yields sit in the same zone: Hercules Capital averages 13.9% on a 90% floating-rate book, and TriplePoint reported a 14.5% weighted-average portfolio yield in Q2 2025. Those realized lender returns sit just below the 15.3% a borrower pays, and every one of them lands well into the teens, far above the 11.5% coupon.
How does the EBITCAC lens change the decision?
A rate in isolation tells you nothing. 15% is cheap if the capital funds a return well above 15%, and ruinous if it does not. cvffund's EBITCAC framework forces that comparison by treating CAC as capital expenditure, so the real question becomes: does a dollar of borrowed capital deployed into customer acquisition earn more than the 15% it costs to rent?
That reframes venture debt as financing for CAC. If your CAC payback sits inside the window lenders want to see and acquired cohorts return well above 15% on an EBITCAC basis, 15% debt is a bargain against 50% equity. If payback is long and cohort economics are thin, the same 15% quietly outruns the return it funds, and you have bought expensive money to chase unprofitable growth. The framework itself is laid out in the EBITCAC explainer.
Two constraints keep the debt honest about how much CAC it can fund. SVB guidance keeps debt service under 25% of net burn, and lenders size facilities at 25-35% of the last round or 30-50% of ARR. Those ceilings, plus the covenants you must check and the DSCR coverage lenders require, exist precisely because the all-in rate beats the coupon. Read alongside our non-dilutive financing pillar, the rule is simple: compute the true rate, then judge it against the EBITCAC return, never against zero.
FAQ
Why is the effective rate higher than the coupon?
Because three charges sit outside the interest rate. The origination fee reduces your net proceeds, the 3-6% final payment is due at exit on top of principal, and warrants transfer equity. In the worked $5M example these add $441,667, about 25% of total cost, lifting an 11.5% coupon to a 15.3% effective rate.
Does paying off venture debt early make it cheaper?
Not as much as you would hope, and sometimes the opposite. The final payment is owed at early repayment, not just maturity, and a prepayment penalty of 1-3% applies if you exit within the first year or two. Repaying early spreads those fixed fees over fewer months, which raises the effective annualized rate rather than lowering it.
How should I value the warrants when comparing offers?
Treat them as synthetic OID, the way Houlihan Lokey does: convert the coverage percentage into a dollar value and add it to your fee stack. Bank warrants near 1-2% of loan value barely move the rate; specialized-fund coverage up to 20% can dominate it. Our warrants deep-dive walks through the dilution math.
Is the after-tax cost lower than 15%?
It can be, eventually. Interest is deductible, so a 6% coupon at a 21% tax rate falls to about 4.74% after-tax. Most early-stage SaaS are pre-profit and cannot use the shield yet, so the pre-tax all-in rate is the number that should drive the decision today.
The headline coupon is the wrong number to negotiate against. Build the full stack, divide by the capital you actually keep outstanding, and you get the real price of the money. Then put that price next to the EBITCAC return the capital is meant to produce. Venture debt at 15% is neither cheap nor expensive in the abstract. It is cheap when it funds CAC that earns more than 15%, and a slow leak when it does not. That is the discipline cvffund applies to every financing question: know the true cost of capital before deciding what it can responsibly buy.
