How to Underwrite a Merchant Cash Advance: A Broker's Guide

Most commercial lending brokers treat underwriting as the funder's job. The best brokers do their own pre-underwriting on every deal before submission — reviewing bank statements, identifying risks, calculating realistic approval amounts, and matching the deal to the right funder. This pre-underwriting is what separates ISOs with 65% approval rates from ISOs with 85% approval rates.

Here's how to read a merchant's bank statements like an underwriter and make submissions that fund.

The Four Things Funders Care About Most

• Monthly gross deposit volume — the primary metric for approval amount calculation
• NSF (non-sufficient fund) count — signals financial distress; high NSF count is the most common decline reason
• Negative day count — how many days the account balance was negative; a proxy for cash flow health
• Open positions — existing MCA advances that are currently being paid back

How to Read Bank Statements for MCA Underwriting

Step 1: Calculate average monthly gross deposits

Add up all incoming deposits across 3–6 months of statements. Ignore transfers between the merchant's own accounts — only count external deposits (customer payments, revenue). Divide the total by the number of months to get average monthly gross deposits. This number is the foundation of the approval calculation.

Step 2: Count NSFs and negative days

Scan each month's statement for NSF fees (usually listed as 'NSF fee,' 'returned item fee,' or 'insufficient funds fee'). Count them and note any pattern — NSFs clustered at month-end signal payroll timing issues; NSFs spread throughout the month signal chronic cash flow problems. Count negative balance days (days the ending balance is below zero or in a negative position).

Step 3: Identify any current MCA positions

Daily recurring ACH debits from funder companies are a clear signal of existing MCA positions. Note the amount, frequency, and estimated total remaining balance. Funders stack these and calculate total daily debt service when deciding whether to add another position.

Step 4: Check for unusual deposit patterns

Large one-time deposits (real estate transactions, equipment sales, SBA loans) inflate average monthly deposits and should be excluded from the revenue calculation. Consistent, regular deposits from multiple sources signal legitimate recurring business revenue.

The Approval Amount Formula

Most MCA funders use a variation of this formula: Advance Amount = Average Monthly Gross Deposits × Multiplier. The multiplier varies by credit tier:

Red Flags That Will Get Your Deal Declined

• NSF count over 15 per month — most funders decline at this threshold
• Negative days over 10 per month — signals the business regularly runs out of money
• More than 2–3 open positions — too much daily debt service; the business can't afford another advance
• Bank statements with obvious large one-time deposits — falsely inflates average revenue
• Inconsistent deposit patterns — revenue one month, nothing the next, suggests seasonal or unstable business
• Recent bounce on existing MCA — a merchant who has bounced payments on previous advances is a major red flag

Matching the Deal to the Right Funder

Once you've pre-underwritten the deal, match it to funders whose criteria align:

• NSF count 0–5: most funders will compete for this deal; submit to A-paper funders first
• NSF count 6–12: B-paper funders; avoid A-paper funders who will decline quickly
• NSF count 12–20: C-paper specialty funders only — and be transparent about the NSF history
• 2 open positions: funders that allow stacking; not all do — know which ones specifically allow 2 or 3 positions
• Industry-specific concerns: some funders avoid certain industries (cannabis, firearms, restaurants with thin margins)

JYNI's lender matrix documents each funder's criteria including NSF tolerance, stacking policy, industry restrictions, and minimum FICO — so you always know which funder to submit to without guessing.

How Pre-Underwriting Improves Your Business

Brokers who pre-underwrite every deal before submission have higher approval rates, faster funding timelines (fewer back-and-forth document requests), and stronger funder relationships. Funders recognize ISOs who submit clean, appropriate deals — and they prioritize those submissions in underwriting.

Bottom Line

MCA underwriting is a learnable skill that pays enormous dividends in your approval rate and funder relationships. Master bank statement analysis, know the red flags that cause declines, calculate realistic approval amounts before submitting, and match every deal to the right funder. This discipline is what separates average brokers from high-performing ones.