Payment-plan calculation — direct answer
The final principal installment should equal only the amount still owed. This calculator now models the unpaid principal month by month and estimates your internal carrying cost on the declining balance. It does not automatically add that internal cost to the customer’s debt.
Calculate your result
Use figures from the same period and currency. Avoid mixing estimates with verified amounts without noting the difference.
Privacy: This calculation runs in your browser. The figures you enter are not submitted to our server.
Why this matters
A payment plan can preserve a customer relationship, but an agreement that is too slow quietly converts the business into an unsecured lender. Duration and carrying cost must be explicit. The calculation helps decide how long the proposed installments will take and whether the carrying period exceeds management’s acceptable limit. That distinction matters because a balance can appear as revenue or a receivable while the business still lacks spendable cash.
Use the verified balance, payment amount and frequency, cost of carrying unpaid cash and the longest period the business can tolerate. Reconcile the figure to the customer contract, invoices, credits and payments before relying on the result. Receivable guidance separates earned or billed revenue from cash actually collected. Contract terms, disputes, collectibility and local recovery law remain decisive. A calculator cannot determine whether an amount is legally due, collectible or properly recognized in the accounts.
How to act on the result
- Require the first payment before pausing collection escalation
- Set automatic dates and consequences for missed installments
- Compare the plan with the customer’s demonstrated ability to pay, not only their requested amount
Use the output to create a dated collection or deposit decision. Record who will contact the customer, what evidence will be sent, what payment method is available and what happens if the commitment is missed. The strongest process removes ambiguity and applies the same escalation logic consistently.
Common mistakes and limits
Avoid forgetting interest or administrative cost, allowing new purchases during default, failing to document the agreement and accepting a payment that never clears the balance. The output is not a credit score, legal demand or expected-credit-loss calculation under IFRS 9 or U.S. GAAP. Those conclusions can require forward-looking data, accounting policy and professional judgment. For large balances or legally sensitive debt arrangements, use a written agreement reviewed for local enforceability and consumer-credit requirements.
What this calculator answers
Does a proposed payment plan recover the balance fast enough?
Formula and assumptions
Principal term = months needed to reduce the outstanding principal to zero at the proposed payment. Internal carrying cost = sum of each month’s opening unpaid principal × (annual carrying-cost rate ÷ 12).
The result is an estimate. It is only as reliable as the inputs, and it does not account for every tax, legal, financing or operational consequence.
Worked-example method
Use the prefilled sample values, calculate once, then replace every input with numbers from your records. The result will show a risk level, key measurements and one recommended next move.
How to interpret the result
- Low: no immediate gap or the entered position is comparatively protected.
- Medium: manageable pressure exists, but it should receive a dated correction plan.
- High: the problem can materially damage cash or operations and requires near-term action.
- Critical: the entered assumptions indicate immediate loss, shortage or survival risk.
Authoritative references
Sources provide general business and operational context. The formula and result are decision-support estimates created by Business Rescue Tools.
Frequently asked questions
How does the calculator handle the final payment?
The final principal installment is limited to the remaining principal balance, so a $1,000 balance paid at $300 per month ends with a $100 principal installment rather than overstating principal payments.
What does carrying cost mean here?
It is an internal management estimate of the cost of leaving principal unpaid over time. It is calculated month by month on the declining unpaid balance.
Does carrying cost become interest charged to the customer?
No. This calculator does not add the internal carrying cost to the customer balance. Any interest, finance charge or late fee must be separately supported by the agreement and applicable law.
What if the plan is longer than my preferred term?
Increase the proposed principal payment, require an upfront catch-up amount or reconsider whether the plan creates unacceptable cash pressure for the business.