Profit and cash flow get confused constantly in practice — understandably, since both come out of the same books and often land on the same desk. But you cannot read your cash position off a profit report: it shows only the result of a month that has already closed, not the ability to pay in the weeks ahead — no line in it states the bank balance. That is exactly why a company can report black numbers and still run into a cash squeeze.
This guide sets out what a monthly management-accounts report actually shows, why it differs from a cash flow forecast, why profit and the ability to pay can diverge, which figures it is missing for a reliable cash view, and how the two instruments work together in practice. The German-specific report at the centre of this is the BWA (betriebswirtschaftliche Auswertung) — the standard monthly accounts summary that German accountants produce from DATEV (the bookkeeping software used by most German small and mid-sized companies and their tax advisors) or comparable systems. The underlying accrual-vs-cash problem it illustrates is universal, whatever your local accountant calls the report.
What the BWA shows — and what it doesn’t
The BWA is the monthly short-form of the books that most German tax advisors deliver straight out of DATEV. It rolls up revenue, cost of materials, personnel costs and other operating expenses into a preliminary operating result — usually set against the prior year and the cumulative year-to-date figures.
What drives the BWA is accrual accounting: revenue counts as soon as the service has been delivered and the invoice issued, regardless of whether the customer has actually paid. Expenses count as soon as they are economically incurred, not when the transfer goes out. That makes the BWA a reliable read on profitability, but a poor instrument for the separate question of whether there is enough money in the account at month end. How to cleanly separate that accrual view from the actual movement of cash is covered in detail in how to calculate cash flow.
| BWA line | What it shows |
|---|---|
| Revenue | Service delivered and invoiced — not the cash received |
| Gross profit | Revenue minus cost of materials — comparable to contribution margin |
| Personnel & operating costs | Expense economically incurred in the period |
| Preliminary operating result | The period’s result — no statement about the bank balance |
P&L vs. cash flow forecast: the core difference
The difference comes down to one question each. A monthly P&L asks, “did the business do well economically this period?” A cash flow forecast asks, “is there enough money to meet the payments that fall due?” Both questions are legitimate — they are simply two different questions with two different answers.
| Feature | BWA / monthly P&L | Cash flow forecast |
|---|---|---|
| Time focus | Past (the closed month) | Future (coming weeks/months) |
| Basis | Accrual (booking date) | Payment timing (due date) |
| Answers | Is the business profitable? | Is there enough cash for what’s due? |
| Cadence | Monthly, with a delay | Weekly, rolling |
Anyone who wants to understand cash flow forecasting from the ground up — methods, horizons, how to build one step by step — will find it in the full cash flow forecasting guide.
Can you read your cash position off the P&L?
Not directly. The BWA stops at the preliminary operating result and has no line that states the bank balance or the funds actually available. Anyone who tries to read cash off it anyway usually takes the operating result as a proxy — and that is exactly what misleads, because the result is distorted in both directions.
Two patterns drive that distortion, plus a timing gap:
- Result without cash: invoices issued but unpaid; expenses booked but not yet transferred; depreciation, which reduces profit without any cash leaving.
- Cash without result: VAT prepayments, loan repayments, capital expenditure, owner drawings and distributions — they hit the account but don’t appear in the P&L, or not at that amount.
- Timing lag: even at identical amounts, the invoice date and the payment date can sit weeks apart.
For a reliable cash view you therefore need three figures the BWA does not contain: the current account balances (from the bank accounts or the trial balance), the open items on both sides with their due dates, and the recurring fixed payments such as payroll, rent, loan instalments and tax deadlines.
What the BWA does reliably deliver is the basis for the cost side of a forecast: gross profit and the expense blocks show the order of magnitude at which personnel, materials and overhead costs fall due month by month — those figures just need mapping onto their actual payment dates.
Worth keeping separate from all this are the liquidity ratios (cash, quick and current ratio): they come from the balance sheet, not the BWA, and describe a single reporting date rather than a path through the coming weeks. Their definitions and limits are covered in the liquidity ratios guide.
Why black numbers can still get tight
A generic example makes the mechanism concrete. A company wraps up a project in April, issues an invoice for €100,000, and books the revenue in the BWA immediately. The project’s costs — materials, subcontractors, a share of wages — are also already booked. The BWA shows a positive result for April.
| Example values (€) | April BWA | Bank balance, end of April |
|---|---|---|
| Revenue (invoiced) | 100,000 | not yet received |
| Costs (booked) | − 70,000 | already paid |
| BWA result | + 30,000 | bank balance still tight |
The figures are generic example values and serve only to illustrate the principle. But the pattern is real: the customer invoice carries a 60-day payment term, while materials and wages fell due within days. April’s BWA shows a profit of €30,000 — the cash for it hasn’t reached the account yet. That exact timing gap between the result and the cash receipt is what a cash flow forecast makes visible, and what a monthly P&L structurally cannot show.
LiquidityLens builds a 13-week forecast with AI from your real bank transactions, CSV exports or DATEV data and open items — week by week, instead of a month in hindsight.
See the Liquidity Control SprintHow the two complement each other
Neither instrument makes the other redundant — they answer different questions, and both belong on the desk of whoever runs the company. The monthly P&L stays the benchmark for profitability: compared against the prior year and the budget, it shows whether revenue, gross margin and cost levels are moving in the right direction, and it is the basis for tax provisions and the conversation with the accountant. How it comes together as part of the monthly close, and where that process can speed up, is covered in the month-end close guide.
The cash flow forecast takes on the other job: it makes sure enough funds are available at every point in time to cover payroll, suppliers, tax and loan repayments, and surfaces shortfalls before they happen — often weeks ahead. The practical standard for that is the week-by-week outlook described in detail in the 13-week cash flow forecast guide.
Practical takeaway: what you need alongside the P&L
In practice this means: the monthly management-accounts report from your tax advisor is not enough to steer your ability to pay — it arrives too late and at too coarse a cadence for that. Anyone who wants to spot shortfalls early needs a separate, weekly-updated cash flow forecast built on open items, account balances and fixed payments, rather than on the accrual result.
The starting point can be built manually in a spreadsheet. Once several accounts, entities or a large number of open items come into play, though, manual upkeep quickly becomes the bottleneck — which is exactly where LiquidityLens pulls the data straight from your bank transactions, CSV exports or DATEV data and rolls the 13-week outlook forward automatically, instead of someone updating it by hand every week. To get a quick, rough feel for how a change in receipts or payments moves your cash position, the free cash flow calculator is a good starting point.
A weekly grid with receipts and payments and an automatic low-point warning — the complement to the P&L that gives you the cash view.
Frequently asked questions
The most important questions on profit versus cash flow are gathered at the end of this page.