APR (Annual Percentage Rate)

Amazon & D2C glossary · Harpy Media

APR (Annual Percentage Rate) is the true yearly cost of borrowed money — interest plus mandatory fees, standardized so different financing offers can be compared honestly. A term loan, a merchant cash advance, and a credit line all quote APRs; the one with the lowest APR is (almost always) the cheapest money.

What is APR?

APR (Annual Percentage Rate) is the true yearly cost of borrowed money — interest plus mandatory fees, standardized so different financing offers can be compared honestly. A term loan, a merchant cash advance, and a credit line all quote APRs; the one with the lowest APR is (almost always) the cheapest money.

For Amazon sellers, APR is the number that decides whether borrowed growth capital compounds for you or against you. Inventory finance, cash-flow bridges, expansion loans: each is a bet that the capital’s return beats its APR — and in e-commerce, inventory cycles make that bet recurring.

Why sellers borrow — and the trap inside the easy money

The legitimate uses: funding inventory ahead of proven demand (Q4 stock, a reorder of a winner), bridging the receivables gap (especially Net-60+ vendor terms), and capturing opportunities with known paybacks. The trap: merchant cash advances and factor-style products quote costs that translate to brutal effective APRs — 30–80%+ — while feeling painless because repayment rides daily sales. When margin is 20% and money costs 60%, volume doesn’t solve it; volume multiplies it.

The comparison discipline

Always convert financing offers to APR (or effective APR for MCAs) before comparing, then test the loan against its purpose: if the capital buys inventory returning 25% per cycle and the money costs 12% APR, the spread compounds for you. If the cost of capital exceeds the return on the capital, you’re borrowing to look busy. The second test is cash-flow shape: even a cheap loan with punishing repayment timing can break a seasonal business — match the repayment curve to your inventory cycle, not just the rate to your margin.

In practice

A seller weighing two Q4 funding options converts both to APR: a bank line at 11% and an MCA with a 1.28 factor rate (repay $1.28 per $1 over four months — an effective APR north of 90%). The line of credit funds the same inventory at one-eighth the cost; the spread, ~$9,000 on the season, is pure margin the MCA would have harvested.

How Harpy Media helps

We model cost-of-capital against inventory returns before clients sign anything — growth math that ignores financing cost is just a slower way of shrinking.

APR FAQ

What is APR?

The standardized annual cost of borrowing — interest plus fees — the only honest basis for comparing financing offers.

What’s a good APR for e-commerce financing?

Context-dependent, but the rule is absolute: it must sit well below the proven return on the capital it funds. Double-digit APR on double-digit-margin inventory usually means the spread is negative.

Why are merchant cash advances dangerous?

Their quoted factor rates translate to extremely high effective APRs while feeling painless — and daily repayments squeeze cash flow exactly when the business needs room to maneuver.