Guide · cash flow underwriting

Cash flow analysis from bank statements: building a DSCR a committee can re-derive

A coverage ratio is two numbers divided by each other, and the division is the least interesting part. What a reviewer checks is where the numerator came from and whether the denominator contains every claim on the same cash. If either side cannot be traced back, the ratio is decoration.

Updated November 2026 · 9 min read

Two analysts can look at the same twelve months of statements and produce coverage figures far enough apart to change a decision, and both can defend their arithmetic. The disagreement is never about division. It is about which deposits counted, which payments were obligations, and whether the owner was paid.

What separates a ratio that survives a committee from one that gets rebuilt is not precision. It is that each side of the ratio can be walked back to a page: the numerator to deposits in an account, the denominator to payments in a schedule or a statement.

Two numerators, and why mixing them fails

The accounting numerator. Net income, plus non-cash charges, plus interest and sometimes officer compensation above market, less distributions and unfunded capital expenditure. It rests on statements and a tax return, and it inherits every accounting choice the borrower made.

The deposit numerator. Operating receipts in the account, less cash operating costs. It rests on the bank, ignores accruals, and cannot see revenue that was invoiced but not collected, or costs that were incurred but not yet paid.

Each is defensible. What is not defensible is a numerator assembled from both — a tax-return net income with deposit additions on top — because the same cash is then counted on one side as profit and on the other as a deposit. State the basis in the heading of the column, and use one basis per column.

The denominator is a list

A debt service figure written as a single number is a claim that nothing was missed. A list is a claim that can be tested. Write it with the payment, the frequency and where the figure came from.

Debt service components, where each figure comes from, and the check that proves it
ComponentSource of the figureCheck that proves it
Term loan, amortisingAmortisation schedule or twelve statement debitsPayment × 12 equals the annual debits as printed
Equipment or vehicle noteContract or the monthly debitAmount and date match on every month of the period
LeaseLease schedule or the monthly debitTerm remaining is stated, not assumed
Line of creditInterest actually chargedLimit is not debt service; the payment is
Card settlement or merchant advanceRecurring debits, daily or weeklyAnnualise by the observed frequency, not by twelve
Tax instalment agreementThe debit, plus the notice if availableShown even though it is not debt; it competes for the same cash
Proposed facilityThe terms being underwrittenSame amortisation basis as the existing debt

Two of these rows are where memos go wrong most often: merchant advances annualised on the wrong frequency, and card settlements treated as operating costs when they are repaying a balance. Both change coverage by more than a fraction.

A worked example, both directions

Numerator, deposit basis (12 months)
  Total deposits                      1,248,000
  less transfers between own accounts  -183,000
  less proceeds of borrowing           -150,000
  less refunds and reversals            -22,000
  = operating receipts                  893,000
  less cash operating costs            -612,000
  = cash available for debt service     281,000

Denominator
  existing term debt                     96,000
  proposed facility                      84,000
  = debt service                        180,000

Coverage (281,000 / 180,000)                 1.56x

If the transfers had not been removed:
  (281,000 + 183,000) / 180,000              2.58x

The ratio is displayed to two decimals for reading only; the amounts behind it are kept exactly as printed, because a committee that disagrees with the conclusion needs to re-add the same figures you did, not a rounded copy of them.

One eliminated transfer of 183,000 moves coverage from 1.56x to 2.58x. That is the entire argument for reconciling the numerator to the account: nothing about the division changes, and everything about the answer does.

Global cash flow: subtract the same cash twice

Where several entities and guarantors are combined, intercompany movements are income to one and expense to the other. Sum the entities without elimination and the group is larger than reality by exactly the size of the movement; subtract only one side and it is smaller. Both errors are common and neither is visible in the final ratio.

The practical rule: whenever two entities are combined, every line that names the other entity is a candidate elimination, and the elimination gets its own row with the amount and the two pages it appears on. In files where related-party rent is involved, decide once whether rent survives elimination and apply that decision to every file, because the two treatments produce materially different coverage.

Seasonality and the four numbers that go with the ratio

  • The worst quarter. Annual coverage can be adequate while the first quarter is below one, which for a monthly repayment is the quarter that decides the deal.
  • Negative days and lowest balance. Liquidity, not profitability, is what causes the default that shows up in a portfolio review.
  • Owner draws in the period. The cash that actually left, not the salary that was booked.
  • The largest single deposit and its source. If coverage depends on one payment, the file should say so before someone else notices.

When not to use us

  • The file needs an audited or reviewed figure. Reconstructing cash flow from an account is not an assurance engagement and should never be presented as one.
  • Most activity is off-bank. If revenue largely bypasses the account, the deposits are an incomplete record and the numerator built from them is not a lower bound — it is a different business.
  • You want the ratio decided for you. The basis, the eliminations and the treatment of owner pay are credit judgements. Our job is to make the arithmetic underneath them checkable.

Where SheetParser fits

The reconciliation is the part we do: deposits totalled by month and by counterparty, transfers between the borrower's own accounts identified so they can be excluded rather than guessed at, refunds and reversal pairs matched, and recurring debits listed with the description as printed and the frequency made visible. Every figure carries the page it came from, so when the committee asks about the 183,000 the answer is a page rather than a conversation.

The judgement stays with you, which is as it should be: whether the management fee is eliminated, whether the advance is annualised weekly or daily, whether the owner's pay is at market. The tool does not choose, and it does not correct a figure to make a ratio look better. For the obligation hunt that feeds the denominator, see the SBA statement review; for the deposit side, deposit analysis.

Common questions

Can you calculate DSCR from bank statements alone?+

Yes, and it is a different calculation from the tax-return version. Deposits become the starting point, non-revenue credits are removed, and cash operating costs are deducted; the result is a cash-basis figure with no accruals and no add-backs. It is the right approach when there are no accountant-prepared statements, provided the basis is stated on the page.

Which is more reliable, net income plus add-backs or deposits?+

Neither, in the abstract: they answer different questions. Net income plus add-backs measures the profit a business reports after accounting choices; deposits measure cash that actually arrived. When the borrower is a cash business with thin records, deposits travel better. When there are audited statements, starting from them avoids reconstructing a whole year from an account that only holds part of the activity.

What belongs in debt service?+

Principal and interest on all existing term debt, leases, vehicle and equipment notes, the proposed facility, and any alternative financing with a fixed claim on cash. Lines of credit contribute their interest, not their limit. Taxes under an instalment agreement are an obligation that competes for the same cash even though it is not debt service, and the memo should show it somewhere rather than nowhere.

Why does global cash flow come out lower than the sum of the entities?+

Because the entities trade with each other. A management fee, rent or intercompany loan is income to one and expense to the other, and adding both sides counts the same cash twice while subtracting only once. Eliminating the movements is not a conservative adjustment; it is the correction that makes the total describe reality.

How do owner draws affect coverage?+

They are a real claim on the cash even when they are not an expense. A ratio computed before owner compensation assumes the owner needs nothing, which is rarely true and never true for long. Whether you treat draws as a deduction or as an add-back to compensation, the treatment belongs in the memo with the amount, not in a footnote nobody reads.

What coverage figure is acceptable?+

It depends on the programme, the industry, the collateral position and the guarantor support, and lenders set their own floors. That is exactly why the calculation should be shown as an equation rather than a verdict: when the committee applies a different floor, they need to be able to change one input rather than rebuild the analysis.

Sources

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