HDB BTO ballot priority is determined by household scheme (Married Couple and Family Scheme, Multi-Generation Priority Scheme, etc.) and any priority schemes the applicant qualifies for. First-timer married couples without elderly parents typically get the standard priority; first-timer couples with elderly parents in the same town get enhanced priority via MGPS.
HDB priority schemes
| Scheme | Who qualifies | Quota |
|---|---|---|
| Married Couple and Family Scheme | SC + SC or SC + PR married | Open to all flat types |
| Multi-Generation Priority Scheme (MGPS) | First-timers with parents in same town | 15% of 2-room and 3-room BTO |
| Parenthood Priority Scheme (PPS) | Couples with at least 1 child below 16 | 30% of BTO units |
| Senior Priority Scheme | Buyers aged 55+ | 40% of 2-room Flexi BTO |
| Married Child Priority Scheme | Couples buying near parents | 15% in same town |
| Single Singapore Citizen Scheme | SC singles aged 35+ (2-room Flexi only) | Limited quota |
Source: HDB priority schemes.
How ballot odds work
HDB releases ballot results approximately 6 weeks after application close. The applicant is assigned a queue number — the smaller the number, the better the unit selection.
Priority schemes give applicants a higher chance of getting a lower queue number — but never guarantee a unit. For a 3× oversubscribed BTO, a priority-scheme applicant has roughly 2× the chance of getting a unit vs a non-priority applicant.
Worked example: 4-room in Tampines (mature estate)
| Applicant type | Queue-number probability (top half) |
|---|---|
| First-timer, no priority scheme | ~30% |
| First-timer, PPS (with child) | ~55% |
| First-timer, MGPS (parents same town) | ~50% |
| Second-timer | ~10% |
For a 5× oversubscribed mature estate BTO, even priority applicants face significant risk of not getting a unit. Two-shot strategies (BTO + SBF in the same launch) double the probability of success.
See related: complete HDB buying guide.
Frequently asked questions
Can I apply for multiple priority schemes?
Yes — schemes stack. A couple with a child living near parents qualifies for both PPS and MGPS.
Do second-time applicants get any priority?
Second-timers compete with first-timers but with reduced priority. Second-timer quotas are smaller.
What if my queue number is too high?
You can decline the offer (no penalty if it's your first time) and reapply in the next launch.