How to structure milestone payments for your interior project

The single most effective way to protect yourself during an interior project is to never let the money get ahead of the work. This sounds obvious, but most homeowners either pay too much upfront or don't define milestone triggers clearly enough. The result is a vendor with your money and insufficient incentive to finish.

A well-structured payment schedule has five stages, each tied to a specific, verifiable event on site. The first payment — typically 10–15% — is the booking advance, paid only after the contract is signed and the scope of work is locked. This should never exceed 20% and should never be paid before you have seen a draft BOQ.

The second payment of around 20% should be released when the design phase is formally signed off: 3D renders approved, material selections confirmed in writing, and execution drawings ready. This payment funds the material procurement phase. Do not release it on the basis of a mood board or verbal approval — the design must be locked in a document both parties sign.

The third and typically largest payment — around 30–35% — should coincide with confirmed material delivery to site, not material ordering. Ask to be present when the truck arrives, or request photo and video evidence with timestamps. Marble slabs, plywood sheets, hardware boxes — everything you paid for should be physically on site and accounted for.

The fourth payment of roughly 20–25% should be tied to carpentry being substantially complete: carcasses installed and levelled, shutters fitted, hardware working. Before you release this payment, do a thorough walkthrough. Open every drawer and door. Check alignment. Take dated photographs. Withhold this payment if punch-list items are outstanding from the previous stage.

The final 10% retention is perhaps the most important payment to manage carefully. Release it only after a full snag walk-through, with every defect on the punch-list signed off by both you and the vendor. Some homeowners hold this final payment for 30 days post-handover to cover any post-move defects. This is excellent practice and most reputable vendors will agree to it if asked.

Beyond the percentages, the language of milestone triggers matters enormously. "Carpentry complete" is too vague and will be disputed. "All carcasses in all four rooms installed, levelled, and anchored per the approved plan, with all shutters fitted and all hardware operational" is not. The more specific your trigger definitions, the harder they are to game.

One final principle: keep a running payment log from day one. Note every payment date, amount, milestone it corresponds to, and how you paid. This record — whether in a spreadsheet or a notebook — becomes your evidence if any dispute arises later.