How to Detect MCA Stacking Before It Destroys Your Portfolio

<strong>MCA stacking</strong> — when a merchant takes on multiple cash advance positions simultaneously — is the single largest driver of portfolio losses in the alternative lending industry. When a business that generates $20,000 per month in revenue owes daily remittances to three or four funders, the math simply does not work. Defaults become inevitable, and every funder in the stack takes a loss.

The challenge is that merchants who stack are often sophisticated borrowers who know how to time applications, spread banking relationships, and obscure existing obligations. Detecting stacking requires a systematic approach that goes far beyond checking a single bank statement for obvious red flags.

What Is MCA Stacking?

Stacking occurs when a merchant obtains <strong>two or more MCA positions that are active simultaneously</strong>. The term comes from the positions being "stacked" on top of each other, with each funder pulling daily or weekly remittances from the same bank account. While a single well-sized position might represent a manageable 10-15% of daily revenue, three positions can consume 30-45% or more, leaving the merchant unable to cover operating expenses.

Why Merchants Stack

• <strong>Cash flow crunch:</strong> The initial MCA did not solve the underlying cash flow problem, so the merchant seeks additional funding
• <strong>Growth financing:</strong> The merchant needs more capital than a single funder will provide and applies to multiple sources
• <strong>Debt servicing:</strong> Revenue from new positions is used to service existing MCA payments — a dangerous cycle analogous to credit card balance transfers
• <strong>Broker incentives:</strong> Some brokers encourage stacking because each new position generates a commission, regardless of the merchant's ability to sustain the combined debt load
• <strong>Timing exploitation:</strong> Merchants apply to multiple funders simultaneously before any single position appears on their bank statements

Red Flags in Bank Statements

Bank statements are the <strong>primary detection tool</strong> for stacking because every ACH debit from a funder leaves a trace. Here are the specific patterns that indicate existing positions.

Regular ACH Debits to Known Lenders

The most direct evidence of stacking is recurring ACH debits with descriptions that match known MCA funders, factors, or their payment processors. These debits typically occur daily (Monday through Friday) or weekly and are consistent in amount. An experienced underwriter can spot these immediately, but the challenge is maintaining an up-to-date database of hundreds of lender identifiers.

Common MCA Lender ACH Identifiers

Multiple Daily Withdrawals

When a merchant has multiple active positions, you will see <strong>multiple ACH debits on the same day</strong> for similar (but not identical) amounts. For example, three debits of $147.00, $223.50, and $189.00 pulling from the account every business day is a clear stacking signal. Single positions produce one daily debit; multiple positions produce clusters.

Declining Average Balance Trend

Stacked merchants frequently show a <strong>declining average daily balance over the statement period</strong>. As each new position adds another daily debit, the account is drained faster than revenue can replenish it. Look for a 20%+ decline in average daily balance from the first month to the third month of a 3-month statement period — this is a strong indicator that debt service is outpacing income.

Manual vs. Automated Detection

Manual stacking detection involves an underwriter reviewing every transaction line on 3 months of bank statements, looking for patterns that match known lender names. This process takes <strong>20 to 40 minutes per file</strong> and depends entirely on the underwriter's knowledge of lender ACH descriptors. Mistakes happen: unfamiliar lender names are missed, and fatigue on the 15th file of the day leads to shortcuts.

Automated detection scans every transaction against a <strong>continuously updated database of lender identifiers</strong>, flags matches instantly, calculates total daily debt service across all detected positions, and produces a stacking risk score. The entire process completes in seconds with zero variability in thoroughness.

Impact on Default Rates

The data is unambiguous: <strong>stacking dramatically increases default probability</strong>. Industry data consistently shows that merchants with 3+ active MCA positions default at 2x to 3x the rate of merchants with a single position. The relationship is not linear — the jump from one position to two positions increases default risk moderately (perhaps 1.3x), but the jump from two to three positions is where the risk curve steepens dramatically.

Best Practices for Position Tracking

• <strong>Scan all statement months:</strong> Don't just check the most recent month. Positions that were paid off recently still indicate the merchant's borrowing behavior
• <strong>Calculate total daily debt service:</strong> Sum all identified MCA debits per day and compare against average daily deposits. If debt service exceeds 25% of revenue, the deal is likely over-leveraged
• <strong>Check for payment holidays:</strong> Some merchants negotiate temporary payment deferrals that create gaps in the ACH record. Look for positions that appear, disappear, then reappear
• <strong>Cross-reference multiple bank accounts:</strong> Sophisticated stackers route different positions through different bank accounts. Request statements from all business accounts
• <strong>Monitor post-funding:</strong> Stacking often occurs after funding. Set up alerts for new recurring ACH debits that appear in the weeks following your advance
• <strong>Use a shared position database:</strong> Industry databases that track active MCA positions across funders are an invaluable supplement to bank statement analysis

Building a Stacking Policy

Every MCA funder needs a <strong>written stacking policy</strong> that specifies maximum allowable positions, maximum combined daily payment as a percentage of revenue, and any automatic decline triggers. Without a policy, individual underwriters make ad hoc decisions that inevitably lead to inconsistency. A well-designed stacking policy typically allows 1st or 2nd position on A/B-paper deals, restricts C-paper to 1st position only, and declines all D-paper with existing positions.

You don't go broke on the deals you decline. You go broke on the stacked deals you should have declined but didn't.

— Common MCA Industry Saying