Milestone Payment Schedule
Schedule milestone payments from a kickoff date.
These calculators are for informational purposes only and do not constitute legal, financial, or professional advice.
How the Milestone Payment Schedule works
The Milestone Payment Schedule calculator turns an interval-based payment clause — "four instalments at thirty-day intervals from kickoff" — into the concrete calendar of dates the clause implies but never states. Enter the kickoff date, the number of milestones, and the interval in days, and it projects every payment date along with the cumulative percentage of the contract value released at each step.
Intervals are counted in calendar days, matching how contracts and net payment terms are written. But each projected date is then checked against the working calendar: a milestone that lands on a weekend or public holiday is rolled backward to the previous working day, not forward. That direction matters — a payment due on a Saturday that moves to Monday is late relative to the contract, while one that moves to Friday arrives on or before the contractual day.
Pick the workweek pattern and holiday country that govern the paying side, since it is the payer’s banking calendar that decides when money can actually move. The projected table is worth attaching to the contract itself: a list of explicit dates leaves far less room for dispute than a formula.
Worked example
A project kicking off July 1 with four milestones at 30-day intervals nominally pays on July 31, August 30, September 29, and October 29. If August 30 falls on a Sunday, the calculator moves milestone 2 back to Friday August 28 — releasing 50% of the contract value on or before the contractual day — and leaves the other dates untouched.
Frequently asked questions
Why do weekend dates move earlier instead of later?
Because these are payment obligations, not delivery deadlines. Rolling forward would make the payment late relative to the contractual interval; rolling backward to the previous working day means the payer meets the date and the payee can plan on the earliest defensible arrival.
Are the intervals business days or calendar days?
Calendar days, matching how milestone clauses and net terms are normally drafted. Only the final landing date is adjusted for weekends and holidays — the interval arithmetic itself includes them.
What do the percentages next to each milestone mean?
The cumulative share of the contract value released once that milestone is paid, assuming equal instalments — 25%, 50%, 75%, 100% for a four-milestone schedule. The cumulative curve is what to negotiate: if half your revenue arrives months after your costs start, the schedule is asking you to finance the project.