Different working-capital problems need different products. Match the cash-flow shape, not just the cheapest sticker rate:
1. Business line of credit (recurring or unpredictable needs)
Revolving facility you draw against as needed, pay interest only on the outstanding balance, and repay to free capacity back up. The structurally cheapest product for recurring or unpredictable working-capital gaps because idle capacity costs nothing. Bank lines price 8–16% APR; non-bank lines 18–35% APR. See Business lines of credit.
2. Term loan (defined, one-time deployments)
Fixed amount, fixed repayment schedule. Best for a defined working-capital deployment — seasonal inventory build, contract deposit, equipment purchase. Bank term loans 9–18% APR; non-bank 20–35% APR for 12–36 month terms. Wrong product if your need is recurring (you'd pay interest on cash you haven't deployed).
3. Invoice factoring (AR-driven cash flow)
Sell outstanding invoices to a factoring company for immediate cash. No owner FICO floor — underwriting is based on your customer's creditworthiness. Advance rates 70–90% of invoice face value, factoring fees 1–5% per 30 days. Only works for B2B invoices. Effective APR climbs fast on slow-paying customers — model the cost on your actual DSO before signing.
4. Revenue-based financing / MCA (fast cash, variable revenue)
Advance against future revenue, repaid as a fixed daily or weekly percentage of receipts. Funding in 24–72 hours, credit floor as low as 500 FICO, no fixed monthly payment. Cost is the highest of any working-capital product — 60–150%+ effective APR on short terms. Stacking multiple MCAs against the same revenue stream is the leading cause of SMB debt spirals. See Term loans vs. MCAs.
5. Equipment financing (working-capital surrogate)
When equipment is the capital constraint, financing it instead of buying it outright preserves working capital for operating needs. Rates 6–25% APR — lower than working-capital products because the equipment is collateral. Section 179 deduction may allow full first-year expensing on qualifying equipment.