An HDB-to-condo upgrade isn’t one decision — it’s a sequence of about a dozen, each with its own timing, and they have to happen in roughly the right order. Pull them out of sequence (say, committing to a condo before you understand your sale proceeds) and you create the gaps and shortfalls that stall upgrades.
Here’s the full journey laid out month by month, the way I’d map it for a client sitting across the table — so you can see the whole road before you take the first step.
Before month one, know your net cash and condo budget. The calculator gives you both in two minutes.
The timeline at a glance
For a typical sell-first upgrade, expect the core process to run 4–6 months from listing to condo keys (longer if you choose a new launch). Here’s the shape of it:
| Phase | What happens | Rough timing |
|---|---|---|
| 0. Groundwork | Check MOP, pull CPF dashboard, set budget, get loan AIP | Before you start |
| 1. Decide strategy | Sell first vs. buy first; set your sequence | Month 0 |
| 2. List the HDB | Engage agent, price, market the flat | Month 0–1 |
| 3. Secure a buyer | Grant Option to Purchase to your buyer | Month 1 |
| 4. HDB resale process | Submit resale application to HDB | Month 1–2 |
| 5. Condo hunt & OTP | Find your condo, exercise the Option | Month 2–3 |
| 6. HDB completion | Sale completes; loan redeemed, CPF refunded | Month 3–4 |
| 7. Condo completion | Pay balance; collect keys | Month 4–5 |
Let’s walk through each.
Phase 0 — Groundwork (before the clock starts)
This is where good upgrades are won. Before you list anything:
- Confirm your MOP is fully served on the HDB portal — see MOP Explained.
- Pull your CPF Home Ownership dashboard for your principal withdrawn and accrued interest.
- Check your outstanding HDB loan balance.
- Get Approval-in-Principle (AIP) from a bank so you know your true loan ceiling.
- Set a realistic condo budget using your net cash, CPF, and TDSR headroom.
Skip this and you’ll be making the biggest financial decision of your life on guesswork.
Phase 1 — Decide your strategy
Sell first or buy first? This single choice shapes your ABSD exposure, your LTV, and whether you need interim housing. For most upgraders carrying an HDB loan, selling first is the cleaner path. Work through it in Sell First vs. Buy First before committing.
Phase 2–3 — List and sell the HDB
Engage an agent, price the flat to the current market, and market it. When you find a buyer, you grant them an Option to Purchase; they exercise it, and you then submit the HDB resale application. From HDB’s acceptance, completion typically follows in about 8 weeks.
Phase 5 — Condo hunt and OTP
With your sale underway and your budget confirmed, you shop for the condo. When you find it, you pay an option fee, then exercise the Option to Purchase (typically within 14 days), at which point Buyer’s Stamp Duty is due within 14 days. If you’ve sold first, there’s no ABSD; if you’re overlapping, the 20% ABSD falls due here too — see ABSD for HDB Sellers.
Tip: negotiate the condo completion date to land shortly after your HDB completion, so your proceeds and refunded CPF are available to fund it.
Phase 6–7 — Completion and keys
Your HDB completes first: the buyer pays, your outstanding loan is redeemed, your CPF is refunded to your OA, and the cash balance reaches your bank. Shortly after, your condo completes: you pay the balance downpayment and your bank disburses the loan. You collect your keys.
If there’s a gap between moving out of the HDB and into the condo, you’ll need a short interim arrangement — a brief temporary extension of stay with your HDB buyer (up to 3 months by agreement), a short rental, or staying with family. The tactics for closing that gap are in Simultaneous Sale and Purchase.
If you choose a new launch instead
A new launch changes the back half of this timeline entirely. You pay via the progressive payment scheme (small early outlays tied to construction stages), and move-in (TOP) may be years away. That long runway makes it easy to sell your HDB, live in it through the resale, and move into the completed condo later — avoiding interim housing. The trade-off is a longer wait and a different cash-flow profile.
A realistic full-journey view
From the day you decide to upgrade, including groundwork, most sell-first resale-to-resale moves run 5–8 months end to end. New launches stretch much longer on the move-in, but spread the payments. Build in buffer — buyers pull out, valuations come in low, and completion dates slip. The upgraders who stay calm are the ones who mapped the whole sequence first.
The bottom line
The upgrade runs: groundwork → strategy → list and sell the HDB → find and option the condo → HDB completes (proceeds + CPF released) → condo completes → keys. The pivot is the CPF refund timing, which is why sequence matters so much. Do your Phase 0 homework, decide your strategy deliberately, and let the rest follow in order.
Net cash from your HDB sale, ABSD exposure, and the condo budget you can actually afford — worked out in about 2 minutes.
General information for Singapore HDB upgraders, not financial advice. Timelines are typical and vary by transaction, market, and property type. Confirm process specifics with HDB, your agent, your banker and your conveyancing lawyer.