Picture a contractor reviewing a finished job. The estimate covered the costs. The crew completed the work efficiently. The job appears profitable in the records. Then the owner checks the bank balance before payroll and feels the pressure anyway.
The customer invoice is still unpaid. A supplier payment is due tomorrow. Another job needs material next week.
This is a hypothetical situation, not a client result. It illustrates why pricing and execution need a third conversation: when will money actually arrive, and when must it leave?
You can understand the job's margin and still miss the timing problem. A dated cash plan makes that problem visible early enough to discuss practical options.
What you will get from this lesson
You will build a short weekly cash forecast using opening available cash, expected receipts and dated outflows. You will learn to distinguish an invoice from a collection, test what happens when an expected receipt moves, and compare your forecast with what actually happened.
This is general business education. Use your accounting professional for advice specific to your records, obligations and financial decisions.
1. Keep profit, invoices and cash separate
Profit describes the relationship between revenue and expenses under the accounting method used. Cash flow describes money moving into and out of the business. The timing can differ.
An invoice records an amount billed. It does not prove that payment has arrived. An approved estimate is even further from cash: the work, billing conditions and collection still need to occur.
Likewise, a supplier invoice and the payment settling it are related records, not two separate cash outflows. A credit-card purchase and the later card payment need consistent treatment so your cash forecast does not count the same movement twice.
Keep your existing accounting system as the source of truth. The exercise here adds a view of dates, not an alternative set of books.
2. Establish the opening amount carefully
Choose a forecast start date and reconcile the opening amount with your current records. Identify money that is restricted, committed or otherwise unavailable rather than assuming the displayed account balance is entirely spendable.
Check how pending payments and uncleared items are handled. If a payment is already deducted from your opening available amount, do not deduct it again in the forecast.
For this exercise, use one clearly defined available operating-cash figure. Record the date and the source. If you cannot explain the opening number, resolve that before trusting the closing number.
3. Put expected receipts on dates
List receipts you reasonably expect during the forecast period. Include the customer or job reference, amount, expected collection date and basis for that expectation.
Separate a confirmed payment notice from an assumption based on usual timing. Keep uncertain receipts visible instead of presenting them as guaranteed money.
If a receipt depends on completing work, submitting documentation or resolving a billing question, note that dependency and who owns the next action. Follow your existing agreements and billing process. This lesson does not establish new payment terms or collection rights.
4. Put outflows on dates too
List the expected cash payments for the same period. These may include payroll, supplier payments, rent, insurance and other operating obligations. Use actual records and known dates wherever possible.
Include upcoming commitments relevant to the forecast, not just expenses from completed jobs. Treat transfers between accounts consistently. If your forecast combines those accounts, an internal transfer does not create new business cash. If you forecast one account, clearly distinguish the transfer from a customer receipt.
5. Calculate one week, then carry it forward
Here is an educational example using invented amounts, not a recommended cash reserve or a description of our company:
- Opening available operating cash: $18,000.
- Expected customer receipts during the week: $12,000.
- Payroll outflow: $9,000.
- Supplier payments: $8,000.
- Other operating payments: $3,000.
The projected closing amount is $18,000 plus $12,000 minus $20,000, or $10,000. That becomes the next period's opening amount, subject to reconciliation with actual movements.
Now look inside the week. Suppose all $20,000 of payments fall due before the $12,000 receipt is expected. The business would face a $2,000 timing gap before collection, even though the weekly closing forecast is positive.
That is why a weekly summary sometimes needs daily detail. The sequence matters as much as the total.
6. Test a delayed receipt before it happens
Move the example's $12,000 receipt into the following week. The first week now projects negative $2,000 rather than positive $10,000. The forecast has identified a question to resolve, not automatically authorized a solution.
Check the receipt assumption, outstanding documentation, upcoming commitments and timing with the responsible people. Discuss any proposed changes through the appropriate approval process. Do not simply postpone obligations or assume financing is available.
Keep both views: the expected case and the delayed-receipt case. Label the assumptions so a reader can see why they differ. Replacing an uncertain date with an optimistic date does not remove the uncertainty.
7. Compare the forecast with reality
At the next review, replace estimates with actual receipts and payments. Record the reason for a meaningful difference: delayed collection, an omitted payment, a changed amount or a duplicate entry.
Then carry the reconciled closing amount forward and update the next periods. Start with a manageable horizon, such as four weeks, and extend it when your operating cycle requires more visibility.
The useful result is a better-informed decision and a more accurate planning habit. A forecast alone does not improve profit or make a customer pay sooner.
Use our original cost workbook alongside the exercise
Download the original BULD May workbook. Page 4 includes a monthly burn-rate assignment. Page 10 asks you to build an expense tracker and identify ways to manage costs; page 11 provides notes space and page 12 space for questions.
Those pages help you identify the business costs behind the cash plan. The dated forecast and delayed-receipt exercise in this article are new teaching exercises. The PDF is a related cost workbook, not a ready-made cash-flow forecasting template.
For the underlying recordkeeping routine, use our electrical contractor expense-tracking lesson.
Questions electricians ask
Does a positive forecast mean the business is profitable?
No. It describes projected cash movement for the chosen period. Review profitability separately using consistent accounting records.
Should every unpaid invoice be counted as next week's cash?
No. Use a supportable expected receipt date and label uncertainty. Keep billed amounts separate from collected amounts.
What should I do first?
Build one week from real records. Check the opening amount, date each receipt and payment, and test the timing of the largest uncertain receipt. Bring the result to the person who helps you manage the books.
I’m Wilson Matthew Betances, and my mission is simple: Building the People Who Build Things. Take one thing from this lesson and put it to work. If it helped, keep learning with us.