The honest answer: there is no official figure
We looked, because you would expect this to be published somewhere. It is not. KKH does not publish a waiting time for developmental assessment. Neither does NUH. Neither does MOH.
That means every “three to six months” and “up to nine months” you read — including in otherwise sensible articles — is somebody’s recollection or estimate, repeated until it sounds official. We are not going to add another invented number to that pile.
What is true is that waits vary with how urgent the referral is, how old your child is, how much demand the service is under, and which route you took in. Two families referred in the same month can have very different experiences.
What ours actually looked like
We went through KKH. The assessment itself ran as two sessions across about two or three weeks, and then there was a follow-up session about a year later.
We share that for one reason only: to show you that the frightening version is not the only version. If you have spent an evening reading that everyone waits the better part of a year, that is not a universal truth either.
But please do not take our experience as the benchmark. One family’s timeline is not evidence about a system, and if yours is longer, that is not because you did something wrong or asked the wrong way. Plenty of families do wait months. Both things are true at once, which is exactly why nobody should be quoting you a number — us included.
The other thing our timeline shows is that the assessment is not always one appointment and done. A review session a year on is a normal part of the picture, not a sign something went wrong.
Should you go private to skip the queue?
Our honest view: for the assessment on its own, we do not think going private is necessary. The public route gets you to the same place, at a fraction of the cost, and connects you to the therapy and follow-up afterwards.
That said, if you would rather pay for a faster, more private experience, that is a perfectly reasonable thing to want and nobody should make you feel indulgent for it. Some families also do both — assess privately for the answer now, stay on the public list for the ongoing support.
Where waiting genuinely does cost you something is when a school transition is closing in. If that is your situation, the calculation changes. Our comparison of KKH, NUH and private lays out the trade-offs, and the cost guide covers what each route actually charges.
What to do while you wait
This is the part that matters, and most of it costs nothing.
Start writing things down — this is the single most useful thing
It is worth understanding why. There is no blood test for autism. The assessment is built substantially from the developmental history that you supply, alongside direct observation of your child. That means your memory is a clinical instrument, and memory under stress is not reliable.
Note what you notice, with rough dates: words gained or lost, how your child responds to their name, how they play alongside other children, what triggers distress, what soothes it. Short phone videos of ordinary moments are worth more than a polished account written the night before.
Get the free developmental screening done
If you have not already, the seven childhood developmental screenings are fully subsidised — S$0 at CHAS GP clinics for eligible Singaporean children, and at polyclinics for eligible PR children aged nought to six. It documents the concern and costs you nothing.
You may not have to wait for the diagnosis to start support
This surprises a lot of parents. A formal autism diagnosis is not required to begin early intervention. The trigger for EIPIC is a paediatrician assessing your child as at risk of a developmental delay — they then recommend it to SG Enable. If a doctor has already seen your child, ask about this directly rather than assuming the queue has to finish first.
Talk to the preschool
Teachers see your child in a setting you never do — with a dozen peers, following instructions, managing transitions. Their observations are genuinely useful input at the assessment, and telling them what you are looking into usually gets you a more careful pair of eyes in the meantime.
And go easy on the research
Reading widely at two in the morning feels like doing something. Mostly it is anxiety with a keyboard. Once you have written down what you have noticed and lined up the practical steps above, the most useful thing left is ordinary time with your child — playing, talking, following what they are interested in. Our early-signs guide covers what is actually worth watching for.
One thing to sort out before the appointment
Work out who is going to be in the room. Much of the session is questions to the adults about your child’s everyday behaviour, and the person best placed to answer is whoever actually spends the days with them. In Singapore that is often a domestic helper or a grandparent rather than a parent. It is worth arranging early — we have set out why it matters in what actually happens in an autism assessment.
Questions parents ask
How long is the wait for an autism assessment in Singapore?
There is no published figure from KKH, NUH or MOH, so any specific number you see is an estimate rather than an official statistic. Experiences vary widely — many parents describe months, while our own assessment at KKH ran as two sessions across about two or three weeks. Waits depend on referral urgency, your child’s age and current demand.
Can I do anything to speed up the wait?
Not directly, beyond making sure your referral reflects the full picture — so give the referring doctor concrete, specific observations rather than a general worry. Going private is the only real way to be seen sooner, and you would be paying the full fee for it.
Is it worth going private just to avoid waiting?
For the assessment on its own, we do not think it is necessary — the public route reaches the same place far more cheaply and connects you to follow-up support. If you would rather pay for speed and a more private experience, that is a legitimate choice. Some families do both: assess privately now, stay on the public list for ongoing care.
What should I do while waiting for the assessment?
Write down what you notice, with rough dates and short phone videos — the assessment relies heavily on the developmental history you provide, so this directly improves it. Get the free developmental screening done, talk to your child’s preschool, and ask a doctor about early intervention, which does not require a formal diagnosis to begin.
Do we have to wait for the diagnosis before starting therapy?
Not necessarily. A formal autism diagnosis is not required to start EIPIC — the trigger is a paediatrician assessing your child as at risk of a developmental delay and recommending the programme to SG Enable. Ask about it at the appointment you already have rather than waiting for the queue to finish.
Is the assessment finished in one appointment?
Often not. NUH describes a typical autism assessment as three to four hours spread over about three sessions, and review appointments can follow much later — in our case a follow-up about a year on. A further session is a normal part of the process, not a sign that something went wrong.
Sources
- NUH — Autism Spectrum Disorder, Children (no biological test; assessment built from developmental history and observation; three to four hours over about three sessions) — nuh.com.sg
- SingHealth — Diagnostic Assessment for Autism Spectrum Disorder (some children need more time or sessions) — singhealth.com.sg
- MOH — Childhood Developmental Screening and Childhood Vaccinations (seven screenings fully subsidised) — moh.gov.sg
- ECDA — Early Intervention Programme for Infants and Children (eligibility is “at risk of developmental delay”, not a formal autism diagnosis) — ecda.gov.sg