How to calculate a business cash flow gap before cash runs out
Forecast gaps by assigning receipts and payments to dates. We explain the formula, illustrate a payment calendar and show how to identify the shortfall and a suitable way to bridge it.
A cash flow gap occurs when available funds on a date fall short of mandatory payments. Build a cash calendar, calculate running balances and find the lowest negative amount. It shows the minimum that must be rescheduled, collected earlier or financed.
What is a cash flow gap?
It is a temporary shortage for liabilities already due. A supplier might be payable on 20 July, payroll on 22 July and customer payment only on 27 July. The transaction may be profitable, yet liquidity is insufficient until revenue arrives.
Mismatched receipt and payment dates are the main cause. Monthly profit, revenue or total receivables alone cannot reliably measure the gap. Calculations require specific dates when cash will actually enter and leave the account.
Profit measures a period's financial result; a calendar shows cash on a day. Profitable businesses may face temporary shortages. If funds remain insufficient after expected receipts, margins, expenses or the business model may be the issue.
Cash flow gap formula
For each day or week, calculate the forecast balance:
A negative result is a cash flow gap, equal to the absolute value of that balance. The required limit should reflect the largest deficit in the period, not merely the first negative amount.
For daily balances of minus RUB 100,000, then plus RUB 200,000, then minus RUB 450,000, the maximum gap is RUB 450,000.
Calculating the gap step by step
Detailed planning for the next 4–8 weeks is useful operationally. Seasonal, manufacturing and long-contract-cycle businesses also need a forecast covering several months.
Include only funds genuinely available: operating account balances, available cash and unused headroom in existing facilities.
Use realistic payment dates rather than invoice dates. Allow for customers who regularly pay late.
Suppliers, payroll, taxes, rent, leasing, loans, logistics, advertising, customs and other outflows should have specific dates.
A profitable month may contain several negative-balance days. The monthly total is insufficient.
It shows the minimum amount to collect earlier, pay later or raise externally.
Delay several major receipts and add likely unexpected costs to test resilience to late payment.
A worked example
A company starts with RUB 800,000. During the week it must pay suppliers, payroll, taxes, rent and a loan. The main customer payment arrives only on 27 July.
| Date | Opening balance | Receipts | Payments | Closing balance |
|---|---|---|---|---|
| 20 July | 800 000 RUB | 0 RUB | 0 RUB | 800 000 RUB |
| 21 July | 800 000 RUB | 0 RUB | RUB 900,000 to a supplier | −100 000 RUB |
| 22 July | −100 000 RUB | 300 000 RUB | 0 RUB | 200 000 RUB |
| 23 July | 200 000 RUB | 0 RUB | RUB 450,000 payroll and taxes | −250 000 RUB |
| 24 July | −250 000 RUB | 0 RUB | RUB 200,000 rent and loan payment | −450 000 RUB |
| 27 July | −450 000 RUB | 1 500 000 RUB | 0 RUB | 1 050 000 RUB |
The largest negative balance is RUB 450,000. The company must reschedule at least that amount, accelerate receipts or obtain financing. An exact-minimum amount may be insufficient if the customer pays late or unexpected expenses arise.
Causes of cash flow gaps
Supply and expenses occur weeks or months before receipts.
Purchasing must be paid before sales or contract revenue arrives.
Expenses start before the high season, while most revenue comes later.
Sales growth also increases inventory, payroll and logistics needs.
An expected receipt moves while the company's own due dates remain.
Decisions use today's balance without accounting for upcoming payments.
Growth-driven gaps
Revenue growth does not immediately improve liquidity. Purchasing stock, hiring staff and paying logistics before customer receipts mean each new order increases working capital needs.
Low-margin gaps
If expected revenue still does not cover expenses, the problem may be structural. Financing merely postpones the deficit. Review margins, fixed expenses and actual order profitability before borrowing.
Determining the financing amount
Start with the largest negative calendar balance. Also assess:
- how many days the negative balance lasts;
- reliability of customer payment dates;
- whether some expenses can be rescheduled;
- seasonal peaks in subsequent months;
- existing loans and mandatory payments;
- the receipt that will repay financing.
A request for reserve cash does not explain repayment. A calendar showing when and why the deficit occurs, borrowing duration and repayment receipt is more persuasive.
Ways to bridge the gap
May work if a supplier agrees to defer or split a large payment.
Agree new dates before arrears arise.Discuss advances, staged payments or earlier receivables collection.
Early-payment discounts should preserve transaction margins.May fit confirmed receivables arising from deferred-payment supplies.
Customer quality, documents and payment terms are assessed.May cover short, recurring business account shortages.
The limit is usually linked to account turnover.May suit recurring working capital needs funded through drawdowns as gaps arise.
The drawdown term should fit the operating cycle.May suit a longer, calculated requirement that a short facility cannot cover.
A long loan may be excessive for a brief one-off shortage.Selection depends on cause, duration, frequency, receivables, account turnover, existing loans and repayment sources as well as amount.
What to avoid during cash shortages
- Waiting until the due date without discussions. Earlier negotiation or financing preparation preserves more options.
- Borrowing without calculating repayment timing. A brief gap can become permanent debt.
- Treating all receivables as guaranteed cash. Forecast realistic dates for specific customers.
- Using tax and payroll funds for optional spending. Reserve mandatory payments in advance.
- Funding structural losses with new borrowing. If future receipts are insufficient, review business economics first.
- Applying to many banks without preparation. First establish product, amount, term and substantiated repayment source.
Preventing cash flow gaps
Update for each payment, customer delay, delivery change or unexpected expense.
Signed completion documents and a possible future deal should not have equal forecast weight.
Record payment dates, delay history and arrears actions for each major customer.
Advances, staged payments, supplier deferrals and document schedules can matter more than headline price.
Its size depends on receipt stability, seasonality, customer concentration and mandatory expenses.
Overdrafts, revolving facilities and factoring are generally easier to arrange before arrears and urgent shortages.
When to seek help
A preliminary review is useful for monthly gaps, major-customer dependence, seasonal purchasing, contract performance or rapid growth.
Before approaching banks, prepare the calendar, operating statements, receivables, payables, existing loans and agreements supporting future receipts.
Calculate the need before arrears arise
NG Finance helps Russian LLCs and individual entrepreneurs review calendars, turnover and debt, establish peak gaps and select financing. An assessment does not guarantee approval but helps identify deficits early and prepare a justified application.
Request an assessmentFrequently asked questions
What planning horizon should a payment calendar cover?
Plan the next 4–8 weeks in detail, with a broader forecast for several months. Seasonal and long-production-cycle businesses need a longer horizon.
Can a monthly total measure the gap?
No. Balances can turn negative early or mid-month even if receipts exceed expenses by month-end. Calculate daily or weekly.
How does a cash gap differ from a loss?
A gap means insufficient cash on a date; a loss means expenses exceed income over a period. Expected receipts may close a temporary gap. Losses require changes to business economics.
How is the financing amount determined?
Start with the largest negative calendar balance, then allow for delayed receipts, unexpected expenses, duration and repayment capacity.
Which is better: factoring, an overdraft or revolving credit?
Factoring often fits confirmed receivables, overdrafts short account deficits and revolving credit recurring working capital. Choose according to term, amount, turnover and repayment source.
When does a gap become dangerous?
Risk grows where shortages recur, increase, survive expected receipts or require continual new borrowing to repay old liabilities.
This article is for information. Financing method, limit, cost, security and documents depend on the provider, transaction structure and the business's finances.