NS liability checklist before PR or citizenship

The "first-gen PRs are exempt" threads on r/askSingapore all run the same way. The IPA comes through, the family celebrates, and nobody has written to CMPB yet. That order is backwards, and it's the expensive way round.

The full planning stack is in citizenship and NS. This is the narrower companion piece: what to work through before you file for, or accept, PR or citizenship in a household with sons.

Before you file, or accept

1. Write down every male child's age, his status path (citizenship or PR, and how he got there), and the country he actually lives in. Liability turns on status and age. It doesn't turn on which passport looks most convenient, and that is the first thing families get wrong.
2. If any son lives abroad, read CMPB's overseas pre-enlistee pages rather than a summary of them. For male citizens and PRs the orientation is liability from 13, registration at 16.5, and enlistment from 18. Those ages arrive faster than a posting plan does.
3. Model the Exit Permit and bond if overseas stays will run to 3 months or more, from age 13 onward. The bond orientation is S$75,000 or 50% of the parents' combined preceding-year gross income, whichever is higher, and you should verify the live figure rather than trust this sentence, because this is exactly the number people quote from memory.
4. Kill the "dual citizenship means no NS" story before it costs you something. Dual-status males are still NS-liable, and Singapore doesn't recognise dual citizenship for adults anyway.
5. Write to CMPB about your own scheme, because a sponsored child PR and the other routes are not the same animal. Keep the reply. Someone else's PTS story in a forum thread is not your letter, and it won't be read as one later.
6. Go deeper on the Exit Permit itself if any of this is live for you: NS Exit Permit for PR families.
7. If anyone in the family is already thinking about renunciation as the way out, understand the terrain first. ICA may withhold PR renunciation where NS is unresolved, and MINDEF's signalling on later EP or study applications has historically been harsh.

What this checklist is not

Three beliefs do most of the damage here, and all three sound perfectly reasonable when someone says them over dinner.

The first is that tourist visits went fine, so an EP will be fine too after renouncing. Tourist luck isn't a long-term pass outcome, and one has never predicted the other.

The second is that taking the ORAL at 21 somehow replaces NS modelling. It doesn't. It's a different product on a different clock, and it's covered in ORAL at 21.

The third is that you'll deal with NS after the PR IPA arrives. This is how families get trapped: celebrating an approval before anybody has clarity from CMPB, and only then learning the shape of what they've accepted.

The rule to hold to

Get a CMPB letter about your actual sons, and let the PR or citizenship strategy follow from what it says rather than the other way round. The parent-side framing of all this lives on citizenship and NS, and the honest stay-or-go version is in long-term stay vs exit.