The best time to assess a purchase's cash impact is before someone agrees to it. By the time the invoice reaches finance, the delivery date, payment terms, and commercial obligation may already be fixed.
A practical commitment record closes that gap. It connects an approved decision with its expected payment dates, even when no invoice exists yet.
The missing period in many cash plans
Consider a team leader who accepts a supplier quote on Monday. Work starts the following week, and the invoice arrives a month later. A forecast built only from received invoices can miss the obligation throughout that period.
The same problem appears in software renewals, inventory orders, accepted job offers, equipment deposits, and project milestones. Someone has already reduced the business's future flexibility, but the cash plan has not changed.
This article extends the supplier-payment guide one step earlier: make spending visible while the business can still choose its scope and timing.
Separate an idea, a commitment, and a payment
Use a few clear states so the team does not mix requests with obligations.
| State | What it means for the cash plan |
|---|---|
| Proposed | Test as an option; do not quietly treat it as approved |
| Approved internally | Reserve planning capacity and confirm whether the supplier agreement is final |
| Committed externally | Record the contractual cash dates and any remaining uncertainty |
| Invoiced | Match the invoice to the existing commitment and update differences |
| Paid or partly paid | Reconcile the actual payment and retain only the outstanding amount |
| Cancelled or amended | Update the remaining obligation after confirming the change and any fees |
Internal approval and a binding contract are different events. Both are relevant to management, but an accountant should determine when a formal payable or other accounting liability is recognized.
Build a record someone can act on
For a material commitment, capture the supplier, description, total amount, currency, expected payment dates, approving person, and the contract or quote reference. Include deposits, taxes payable with the purchase, implementation charges, and any minimum term.
Add a last decision date: the point before which scope or timing can still be changed under the agreement. For a renewal, this may be the cancellation-notice deadline rather than the payment date.
That field changes the weekly conversation. “The renewal is due in six weeks” sounds distant. “We must decide by Thursday whether to renew” creates a clear action.
Approval needs two separate questions
First, does the purchase make business sense? Consider expected benefit, alternatives, scope, and who will own the outcome.
Second, can the business meet the payment schedule while preserving enough liquidity? Put the actual payment dates into the forecast and compare the lowest cash balance with your threshold. An annual budget allowance cannot answer that question on its own.
A purchase can be worthwhile and still need a different delivery schedule. Conversely, having money in the bank does not make an unnecessary purchase worthwhile.
For small purchases, keep the process proportionate. For larger, recurring, or hard-to-reverse commitments, require enough detail to understand both questions before agreement.
Worked example: an approved project meets a cash constraint
Cedar Lane Services, a fictional business, has a base forecast with closing cash of $62,000 in week 2 and $53,000 in week 6. Its internal minimum is $40,000. The proposed project is not yet included in those balances.
The supplier offers a $24,000 project: a $9,000 deposit in week 2 and the remaining $15,000 in week 6. No additional customer receipts are expected from the project within the forecast horizon.
| Cash position | Week 2 | Week 6 |
|---|---|---|
| Base forecast before project | $62,000 | $53,000 |
| Cumulative project payments | ($9,000) | ($24,000) |
| Forecast after project payments | $53,000 | $29,000 |
| Headroom above / below $40,000 minimum | $13,000 | ($11,000) |
The project fits its budget, but its payment schedule pushes week 6 cash $11,000 below the minimum. Showing cumulative payments matters: the deposit still reduces cash in later weeks.
Before signing, the owner could negotiate smaller phases, reconsider the start date, or arrange an appropriate funding source. Any revised payment schedule belongs in the forecast only after it is agreed. Inspect every week after a change; moving one payment may simply move the cash problem.
Count each obligation once
A commitment record should become more precise as evidence arrives. It should not create a second expense each time the document changes.
For the project above, the $9,000 deposit invoice should match the planned deposit. When paid, actual cash decreases and the corresponding future payment is removed or settled. The outstanding $15,000 remains visible.
If the final scope rises to $26,000, record and approve the additional $2,000. Update the remaining payment rather than leaving the old estimate beside the new invoice as if they were different purchases.
The cash-data checks explain why the handoff from expected to actual cash deserves special attention.
Use clear processes to protect supplier relationships
Tell suppliers how to submit invoices, what references are required, and whom to contact about a discrepancy. Internal uncertainty over who approved something should not become a routine reason for paying late.
The UK Small Business Commissioner's guidance on payment processes emphasizes defined responsibilities and reliable procedures. A commitment record makes those responsibilities easier to establish before the bill arrives.
If the forecast shows a shortfall, raise it early. A proposed delay is a discussion to have with the supplier, not an assumption that removes an obligation.
Start with the next five decisions
Ask each team leader for their next five material purchases or renewals. Record the cash dates and the last date to change course. Compare the combined list with the existing payables and forecast, removing overlaps.
CashCatalyst's expected items can bring dated commitments into the operating cash view. Keep purchase authorization and supplier agreements in the business's approval process; a planning entry is not approval or payment execution. See the product guide for handling expected items.
At the next weekly review, discuss the commitments whose decision dates arrive first. That is where the team still has room to act.
Frequently asked questions
Should a purchase request enter the base forecast?
Label it as a proposal until the appropriate decision is made. Test its cash effect separately, then update the plan when it is approved or committed. Be explicit about which status your base forecast includes.
What if the invoice amount is different from the commitment?
Investigate the difference against the agreement, delivery, taxes, and approved changes. Update the amount only after resolving the difference through the normal approval process.
Sources and editorial note
Further guidance: UK Small Business Commissioner on clear supplier-payment processes. The commitment workflow and numerical example are original editorial illustrations. Contractual and accounting treatment depends on the actual agreement and applicable rules.