A schedule like this is the natural attachment to an installment agreement, a debt repayment plan, or a rent arrangement. Once both sides sign a table of dates and amounts, “when was that due?” stops being a debate.
How it is calculated
Payment k due on: start date + (k − 1) × interval, for k = 1 to n
Start date is when the first payment is due — pick a day tied to the payer's income, such as just after payday.
Interval is the gap between payments: weekly, every two weeks, or monthly are the common choices.
n is the total number of payments; the last date in the table is the plan's completion date.
For monthly schedules, dates keep the same day of the month; a day like the 31st shifts to the last day of shorter months.
Each row of the output pairs a due date with an amount, plus a cumulative total so anyone can see what should have been paid by any given date.
Example
A friend owes you 36,000 THB and you agree on 6 monthly payments of 6,000 THB starting 15 July 2026. The generated schedule runs: 15 July, 15 August, 15 September, 15 October, 15 November, and a final payment on 15 December 2026 — by which date the cumulative total reaches exactly 36,000 THB.
If the same debt were paid weekly at 1,500 THB over 24 weeks starting Friday 17 July 2026, the schedule would list every Friday through 25 December 2026. Same money, different rhythm — pick the one matching how the payer earns.
Understanding your result
Attach the schedule to the written agreement and reference it in the text (“as set out in the attached payment schedule”). Both parties should sign or initial the schedule itself, not just the agreement.
Use the dates actively: each row is a reminder trigger. A short friendly message a few days before each due date prevents far more missed payments than any penalty clause.
As payments arrive, mark them against the schedule and keep the transfer slips. A ticked-off schedule plus receipts is the cleanest possible evidence of how repayment actually went.
Frequently asked questions
Should payments be weekly or monthly?
Match the payer's income rhythm. Salaried people manage monthly payments best, ideally dated a day or two after payday. People with daily or weekly income usually find smaller weekly amounts easier to keep up. The total is the same; the failure rate is not.
What happens when a due date lands on a weekend or holiday?
Decide the rule in advance and write it into the agreement — commonly the next business day, though with instant bank transfers and PromptPay many people simply keep the calendar date. Either rule works; ambiguity is what causes arguments.
What if the total doesn't divide evenly into the payments?
Keep every payment identical and adjust the final one. Splitting 10,000 THB into 3 payments gives 3,333.33, 3,333.33, and 3,333.34. The schedule should show the adjusted final amount explicitly so the last payment is not a surprise.
Can I put the schedule directly into a loan or installment agreement?
Yes — that is the intended use. Reference the schedule in the agreement body and attach it as a signed page, or paste the table into the agreement itself. The key is that the same dates and amounts appear in one signed document, not in two versions that can drift apart.
How should we change the schedule if circumstances change?
Never verbally. Generate a revised schedule, mark the old one as replaced, and have both parties sign the new version with the date of the change — or use a short amendment noting which payments moved. A paper trail of revisions protects whichever side later needs to prove what was agreed.
Does a payment schedule show interest breakdown?
No — a payment schedule lists dates and amounts due, which is all most agreements need. If you want each payment split into interest and principal with a running balance, that is an amortization schedule; generate it separately when the loan carries periodic interest.
Results are estimates for general information only and may differ from a lender's exact figures. They are not financial or legal advice.