The stack test —
seven signals of decline.

We call it the stack test because the signals tend to cluster — when one appears, others usually follow. An underwriter scanning a file at 9:15 in the morning is not running a regression model in their head; they're looking for the specific pattern indicators that predict, with high accuracy, that the file will default or perform poorly. If three of these seven are present, the file gets declined or priced punitively. If five are present, the file is essentially unfundable through mainstream channels.

Signal 1: MCA ACH descriptors on recent statements

The single fastest way to confirm a merchant has existing MCA exposure is to scan the daily debit descriptors on the bank statements. Mainstream MCA funders use recognizable ACH descriptors — abbreviations or partial company names that show up on the statement consistently. "STR CAP," "CAN CAP," "ONDECK," "KABBAGE," "FORA," "BLUEVINE," "RAPID," "CREDIBLY," and dozens of others are identified on sight. An underwriter doesn't need to ask whether the merchant has an existing advance — the descriptors tell the story.

The mechanic of decline: most lenders won't fund into a stacked position, full stop. A few will, but only with a payoff or subordination of the existing position, and the pricing reflects the additional risk. If an existing MCA debit is on the statements and there's no plan to pay it off, the file is functionally a consolidation application — and consolidation underwriting has its own, stricter criteria. Remediation: either pay off the existing position before applying for new capital, or apply specifically for consolidation rather than new working capital. The descriptor doesn't go away, but the deal structure that matches it does.

Signal 2: Total daily debits exceeding 8-10% of daily deposits

This is the ratio that matters most on the underwriting screen. Add up the total dollar amount of all daily ACH debits (existing MCAs, equipment payments, subscription services, payroll provider, etc.) and divide by the average daily deposit. If the ratio is below 5%, the file has substantial cash flow capacity. Between 5% and 8% is manageable. Above 8-10%, the file is at the edge of what most lenders will fund, because the new advance's daily debit would push the total ratio into a range where any revenue dip causes a debit failure.

The math is simple. A merchant with $3,000 average daily deposits and $300 in existing daily debits is running at 10%. Add a new advance with a $200 daily debit and the total becomes 17% — well above the typical underwriting comfort zone. Remediation: pay down some of the existing debits before applying, or structure the new advance with a longer term to reduce the daily ACH amount. The underwriter is solving for the resulting ratio, not the gross dollars.

Signal 3: NSF count trending up

NSF — non-sufficient funds — events are bounced ACH debits or checks. Every bank statement lists them. Underwriters count them in the trailing three months and look at the trend. Two or three NSFs in any given month is common and not disqualifying. More than five NSFs in a month, or a clear upward trend across the trailing 90 days, is a serious signal. It tells the underwriter the business is running on the edge of its cash buffer and a new daily debit may be the trigger that pushes it over.

The mechanic of decline: NSF count is the leading indicator of cash flow stress. Underwriting models weight it heavily because it has high predictive power for eventual default. A file with rising NSFs gets declined or priced punitively even if every other signal is clean. Remediation: 60-90 days of disciplined cash management — moving recurring debits to dates when deposits have already cleared, maintaining a minimum operating balance, getting overdraft protection in place to prevent technical NSFs that aren't actually about cash position.

Signal 4: End-of-day balances trending to zero or negative

The bank statement shows the closing balance each day. Underwriters scan this column for the pattern. A healthy file shows end-of-day balances that fluctuate but average well above zero. A stressed file shows end-of-day balances that repeatedly approach zero, dip negative, and recover only when the next deposit clears.

The mechanic of decline: zero-balance days indicate the merchant has no buffer. Any revenue dip or unexpected expense translates directly into a missed debit or a vendor payment failure. New advance debits stack on top of an already stressed cash position and produce defaults within 60 days. Underwriters know this and decline the file. Remediation: build a minimum operating reserve, ideally equivalent to 7-14 days of debits, that sits in the operating account and isn't drawn down. Most operators can achieve this in 30-45 days by deferring optional owner draws or supplier payments to the period right after major deposit cycles rather than before them.

Signal 5: Recent UCC filings against the business

Every funder pulls a UCC search before approving. UCC-1 filings show every active security interest against the business's receivables, equipment, or general assets. A new UCC filing within the trailing 90 days is a flag — it tells the underwriter the merchant recently took on secured financing of some kind, often an MCA that hasn't yet shown up clearly on the bank statements.

The mechanic of decline: a recent UCC filing creates either a stacking concern (if from an MCA funder) or a collateral conflict concern (if from an equipment lender or factor). Mainstream MCA underwriters don't want to be the second-position claim on the merchant's receivables, and most don't want to fund into a recently taken MCA position. Remediation: pull your own UCC search before applying and understand exactly what filings are on file. Some filings can be terminated by requesting a UCC-3 termination from the original filer if the underlying obligation has been paid off — a step many merchants don't realize is required and don't take.

Signal 6: Cross-collateralization clauses in existing positions

A cross-collateralization clause in an existing MCA or term loan agreement says that the lender's security interest in the merchant's receivables covers not just the original obligation but any future obligation to the same lender. The practical effect is that the existing lender's UCC filing functions as a permanent lock on the merchant's collateral, even after the original advance is paid off.

The mechanic of decline: a new lender pulling a UCC search sees the prior filing, asks about the underlying contract, finds cross-collateralization language, and declines because they can't take a clean first position. Remediation requires either a written subordination from the original lender or a UCC termination after payoff and explicit confirmation that the cross-collateralization is released. This is the signal merchants are most often unaware of, because the cross-collateralization language is buried in the original contract and the merchant doesn't realize it's still constraining future financing options two years later.

Signal 7: Processing volume diverging from deposit volume

For merchants that take card payments, the underwriter compares two numbers: the merchant processor statement (showing gross card volume) and the bank statement (showing actual deposits). The two should be roughly aligned — card volume net of processing fees should equal card-driven deposits, with a small lag. When the numbers diverge significantly — particularly when processing volume is high but deposits to the operating account are low — the underwriter assumes the merchant has either changed processors recently, is routing settlement to a different bank account, or is experiencing chargebacks that are eroding net settlement.

The mechanic of decline: split deposit accounts make daily debit underwriting unreliable, because the underwriter can't tell which account the new debit will have to clear from. Recent processor changes suggest the merchant may be trying to avoid existing MCA splits (where the funder is intercepting card settlement at the processor level). High chargeback ratios indicate operational stress. Remediation: consolidate processing and deposits into a single visible account for the 60-90 days before applying, and have a clean explanation ready for any historic divergence.

How to score yourself

Pull your last 90 days of bank statements, your most recent processor statement, and a UCC search on your business. Walk through the seven signals in order and mark each as present or absent. Zero or one signal present: the file is strong and pricing should be competitive at mainstream lenders. Two signals: the file will fund but pricing will be average — improvement before applying is worth the time. Three signals: the file will face headwinds; expect aggressive pricing or targeted decline at top-tier lenders. Four or more: the cleanest path is to defer the application, address the worst one or two signals, and re-apply in 60-90 days. Five or more: the file is functionally unfundable through standard channels and the next conversation should be about workout strategy rather than new capital.

The seven signals are not arbitrary. They map directly to repayment risk on daily-debit products, which is why every underwriter looks for them and why the newer ML-driven platforms have effectively automated the same analysis. The merchants who get funded fastest at the cleanest pricing are the ones who scored themselves before applying, addressed the issues that were addressable, and submitted a file where the underwriter's first-pass screen turns up zero red flags. That's not an accident of luck — it's an outcome of preparation.