Quick answer
Fundbox doesn't use traditional MCA factor rates. Instead, it charges weekly fees of 4.66-8.99% on the drawn amount over 12 or 24 weeks. A $10K draw repaid in 12 weeks at 5% weekly fee equals $6,000 total fee paid (60% effective APR). Always model the all-in cost before drawing — weekly fees compound fast on short terms.
Full answer
Fundbox does not use the standard MCA factor-rate structure. It uses a weekly fee model: each time you draw against your line of credit, you pay a fixed weekly fee on the drawn amount over either a 12-week or 24-week repayment term.
Published fee range: 4.66% to 8.99% per week, depending on your underwriting profile and the term length chosen. Lower-risk profiles + 24-week terms get the lower end; higher-risk + 12-week terms get the higher end.
Concrete math: a $10,000 draw at 5% weekly fee over 12 weeks = $500/week fee × 12 weeks = $6,000 total fee on top of the $10K principal. Repayment: $10K principal + $6K fee = $16K total over 12 weeks, or ~$1,333/week. Effective APR works out to roughly 60% — much steeper than the 5% headline suggests.
Same $10K at 4% weekly over 24 weeks = $400/week fee × 24 = $9,600 fee. Total payback $19,600 over 24 weeks = ~$817/week. Effective APR ~40%. Longer term lowers weekly cash strain but raises total cost.
Compare to MCA: Fundbox 30-60% APR-equivalent is in the same ballpark as B-paper MCA factor rates (1.30-1.45 factor over 6-12 months = 35-70% APR). Fundbox's advantage is no daily auto-debit (weekly only) and revolving line structure (re-draw without re-applying).
Where to be careful: the headline 5% weekly fee sounds tiny until you annualize it. Always calculate the total fee × weeks of repayment + compare to alternative funders' APR-equivalents. For longer-term capital needs, an APR-disclosed term loan (OnDeck, Credibly, Funding Circle) is materially cheaper.
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Methodology. Fundnode is an independent funding-platform that scores merchants against our 100-funder database. We earn referral fees from funders when merchants apply via Fundnode. Editorial rankings and answers are independent of fee structure. Updated 2026-06-25.