The Cost-of-Capital Calculation Most Owners Get Wrong

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By Jon Lynch — Commercial Finance Broker, Jon Lynch Financial Group · Veteran-owned · Updated July 19, 2026

Most owners price capital against zero. They see a factor rate, work out what the advance costs versus what they repay, and stop there. That's the wrong comparison. The right one is capital against the cost of not acting — the contract you can't staff, the inventory you miss before the season, the hire you lose while you wait.

Four costs are in play every time you take capital, and the offer sheet only shows you one of them: direct cost — the advance versus total repayment; cash-flow cost — what the remittance does to your operating runway while you're repaying it; opportunity cost — what not having the money costs you; and risk cost — what happens if the revenue you're counting on doesn't show up on schedule.

Run all four and the picture often flips. Expensive capital can be the correct decision. Cheap capital can be the wrong one. The difference was never the factor rate alone — it's whether the total cost is smaller than the cost of standing still. Below is the framework, then the arithmetic, both directions.

42%

of small business financing applicants received the full amount they requested
Federal Reserve, 2026 Small Business Credit Survey

The other 58% are the ones actually running this calculation — deciding whether costlier capital is worth taking at all.

Why is "expensive vs. cheap" the wrong question?

Ask most owners what capital costs and they'll cite the factor rate. That's a real number — and a comparison against zero, as if the alternative to taking the money is a world where nothing else changes.

Nothing else changes is rarely true. The alternative is usually specific: the contract goes to a competitor who can staff it, the seasonal order ships without your inventory, the hire takes the other offer. Compare the cost of capital to that, not to zero.

Four costs matter, not one. The table below is the framework; the rest of this piece is the arithmetic behind each row.

CostWhat it measuresWhere you'd see it
Direct costAdvance vs. total repaymentThe offer sheet
Cash-flow costWhat the remittance does to operating runwayYour bank balance, week to week
Opportunity costWhat not acting costs youThe contract, season, or hire you lose
Risk costWhat happens if the revenue assumption missesThe stretch after a slow month

What is the direct cost of capital?

This is the only cost most financing conversations cover. With revenue-based financing, you're not borrowing at an interest rate — you're selling a slice of future revenue today. A funder advances a sum; you repay a larger total, remitted as a percentage of sales. The gap between the two is the direct cost, expressed as a factor rate.

It is genuinely more expensive than a bank facility, dollar for dollar — the price of speed, unsecured access, and underwriting deposits instead of collateral. Owners who stop the analysis here conclude, correctly on this one axis, that the money is expensive. They're just not done.

What does the holdback do to your cash flow?

Direct cost tells you what the money costs once fully repaid. It says nothing about whether you can breathe while repaying it.

A holdback is a fixed percentage of revenue, remitted automatically until the total is satisfied. A $60,000 advance repaid at 15% doesn't feel like one bill — it feels like every deposit arriving 15% lighter, for months.

If your margin absorbs that, the deal is survivable even if expensive on paper. If it doesn't — if the holdback lands on top of payroll and a thin margin — a "reasonable" factor rate can still run you out of cash. This cost hides because it's never one number. It shows up as a squeeze.

What does it cost you to wait?

This is the cost most owners never calculate, and it's often the largest number in the equation.

Opportunity cost is what not having the capital costs you: the contract lost to a competitor, the inventory missed before the season and the margin that goes with it, the equipment that would have won the bigger job, the employee who takes the other offer.

Put a number on it. If you can't — if there's no specific contract, order, or date attached — that's useful too: the opportunity cost is probably low, and the bar for taking expensive capital should be much higher.

What if the revenue assumption is wrong?

Every calculation above assumes the revenue you're counting on shows up roughly on schedule. Test what happens if it doesn't.

Structure matters more than price here. A holdback tied to a percentage of revenue flexes down in a slow month — you remit less because you sold less. A fixed payment doesn't know your month was slow; it's due regardless. If your plan depends on revenue that hasn't happened yet, that flexibility is doing real work you're not pricing in.

Run the downside case, not just the expected one. If the deal only works when the projection is exactly right, the risk cost is high enough to change the decision — whatever the factor rate says.

What does this look like with real numbers?

Illustrative numbers, to show the arithmetic — not a quote, an average, or a promise.

Scenario A — expensive capital, correct call. A contractor is offered a $140,000 job with roughly $45,000 in margin, on condition she can mobilize crew and materials within two weeks. She doesn't have $60,000 in free cash. A funder advances $60,000 at a 1.35 factor rate — total repayment $81,000, direct cost $21,000 — remitted at 15% of revenue. Average monthly revenue is $150,000, so the remittance runs roughly $22,500 a month, repaid in about three and a half months.

Set the $21,000 direct cost against the $45,000 in margin she'd otherwise lose: she nets roughly $24,000 by taking expensive capital, against losing the job by waiting. If the job runs a month late, the holdback simply pulls less and stretches the payback — the structure protects her.

Scenario B — cheap capital, wrong call. A different business takes a low-cost, fixed-payment term loan to stock inventory for a product line with no confirmed orders and no specific date — just a hope demand shows up. The direct cost is genuinely low. But there's no opportunity cost to weigh it against, since nothing specific was actually being lost by waiting. And the payment is fixed: if inventory sells slowly, the note still comes due every month, regardless of revenue.

Scenario A (contract)Scenario B (inventory)
Direct cost$21,000 on a $60,000 advanceLow, fixed payment
Opportunity cost if declined$45,000 in lost marginNone specific
StructureFlexes with revenueFixed regardless of sales
VerdictExpensive, correctCheap, wrong

The lesson isn't "revenue-based financing is good" or "term loans are bad." Price alone doesn't tell you which is correct. The other three costs do.

When does expensive capital make sense — and when doesn't it?

A few honest lines, since this is the part most pitches skip:

Working capital, handled. Tell us what you're funding and by when, and we'll run the actual numbers — including whether waiting is the smarter move.

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Frequently asked questions

Is expensive financing ever the right choice?
Yes — when what you'd lose by waiting exceeds the capital's total cost, direct plus cash-flow. Run the math; don't assume it from the factor rate alone.
What's the difference between direct cost and cash-flow cost?
Direct cost is advance vs. total repayment. Cash-flow cost is what the remittance does to your operating account meanwhile. A deal can pass one test and fail the other.
How do I estimate the opportunity cost of not acting?
Name what you'd lose without it — a contract's margin, a season's inventory, a hire you can't make. No figure? The opportunity cost is probably low.
What is risk cost, in plain terms?
What happens if the revenue you're counting on comes in late or thin. Revenue-based repayment flexes with sales; a fixed payment doesn't. Structure matters as much as price.
Is revenue-based financing a loan?
No. It's a purchase of future receivables — an advance repaid via a percentage holdback on revenue, priced as a factor rate, not an interest rate or APR.
How does JLFG decide what to recommend?
By running this framework against your bank statements, out loud — including telling you when the honest answer is to wait, or go to your bank instead.

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