HDB requires buyers and sellers to submit their portions of a resale application within seven calendar days of each other and within the timeframe agreed in the Option to Purchase. When the matching submission misses HDB’s window, the incomplete application lapses and the parties have to restart the submission process. Primary source

For an HDB resale submission, make a note of the first confirmation date. Ask the other party for their confirmation as soon as they submit.

Which date starts the seven-day window?

Start with the actual submission of the first party’s portion. HDB counts the interval between submissions. The separate timeframe written into the OTP also matters. Keep HFE validity and the Request for Value deadline on the same calendar so that a late second submission does not create another problem.

What should you do if the second party cannot submit?

Ask what is holding up the submission. Match the OTP serial number, option and exercise dates, price, deposit and flat address against the signed document. Get in touch with HDB promptly if the portal rejects either portion or the window may close. Check whether a fresh submission has any implications for your documents and fees.

What to keep on hand

• The signed OTP and its agreed submission window.
• Both parties’ portal confirmations and reference numbers.
• The HFE and valuation validity dates.

Read HFE expiry and resale deadlines for the related decision. Additional official guidance

Does the first submission mean HDB has accepted the deal?

The application is complete once HDB receives both portions and the necessary documents. Acceptance and approval are later stages.

If you want help planning your property timeline, contact Jim Tan at Propsbit.

Sources checked 14 November 2026. This article is general information. Confirm how the rules and documents apply to your transaction with the relevant authority or adviser. Examples are illustrative. Images are AI-generated editorial illustrations.