Underwriting bank statements is a data job that is sold as a document job. The statements arrive as PDFs in a dozen layouts, and the work is turning them into a ledger that can be tested. What separates a credit file that survives a second reader from one that does not is whether every figure can be traced back to a line on a page.
What deposit analysis is actually measuring
- Recurrence. Months with deposits, and how steady the level is across them.
- Source. Which credits are revenue, and which are transfers, loans or refunds.
- Concentration. How much of the total comes from the largest one or two payers.
- Volatility. The spread across months, not just the average.
- Stress. Negative days, overdrafts and returns, and how deep they went.
- Capacity. Recurring debt service against net deposits, not gross.
Bank statement analysis for lenders is therefore a set of comparisons over time. A number alone answers none of them, which is why a file containing one total is not an underwriting file.
The three statements an underwriter reads first
The month with the lowest balance
Not the most recent month, and not the best one. The low point describes the exposure. If the business only clears its obligations in its strongest month, the product is being underwritten against the wrong period.
The month with the largest deposit
A single outsized credit often carries a total. Looking at it is how a concentration problem or a non-revenue deposit gets found, and both change the picture materially.
The most recent month
Only third, because it is the one most likely to be unrepresentative in the other direction: a good recent month is not a trend, and a bad one is not necessarily a collapse.
What deposit analysis underwriting cannot tell you
Statements show money moving through an account. They do not show profitability, the order book, whether a large credit will repeat, or what the business owes elsewhere. That is why the analysis is evidence rather than a decision: it establishes what can be verified, and it makes the assumptions explicit enough that someone else can test them.
A file that says “average monthly deposits of $84,000” is an assertion. A file that says the same thing with twelve months of rows, the non-revenue credits removed and each month reconciled to its opening and closing balance is evidence. The difference is the whole reason to do the work in a spreadsheet rather than by eye.