If you are weighing Singapore citizenship, one question decides everything: can you keep your current passport? This guide lays out Singapore’s dual citizenship rules in full, the one real exception for children, the National Service angle, what you give up when you renounce, and what it all means if you are a PR thinking about the next step.
Quick answer: No. Singapore does not allow dual citizenship for adults. To become a citizen, you must renounce all other nationalities. The only exception is for children, who may hold two citizenships until age 21, after which they must choose one. Holding Permanent Residence (PR) abroad is fine; holding a second citizenship as an adult Singaporean is not.
The short answer
Singapore does not recognise dual citizenship for adults. If you take up another country’s citizenship, you are expected to give up your Singapore citizenship, and if you become a Singaporean, you must renounce every other nationality you hold.
This is written into Singapore’s Constitution and enforced in practice. Between 2019 and 2023, roughly 1,600 Singaporeans a year either renounced or had their citizenship revoked, many linked to holding another nationality.
Why Singapore does not allow dual citizenship
The policy comes down to three ideas the government has held firmly for decades:
- Single allegiance. Citizenship is treated as an undivided commitment to one country, not shared across two.
- National Service. Every male citizen carries an NS obligation. Dual citizenship would let some sidestep a duty others cannot.
- Equal responsibilities. One citizenship keeps civic rights and duties consistent for everyone.
There is no sign this will change. Officials have repeatedly ruled out allowing adult dual citizenship.
The exception: children can hold two citizenships until 21
The one genuine exception is for minors. A child born overseas to a Singaporean parent often picks up the birth country’s citizenship automatically, alongside Singapore citizenship by descent. Singapore tolerates this, but only until the child grows up.
Here is the timeline that matters.
|
Stage |
What happens |
|
Birth to age 21 |
The child may legally hold Singapore citizenship plus a foreign one |
|
Turning 21 |
The countdown begins. Within 12 months, the person must decide |
|
To keep Singapore citizenship |
Renounce the foreign citizenship, then take the Oath of Renunciation, Allegiance and Loyalty (ORAL) |
|
By the 22nd birthday |
If the oath is not taken, Singapore citizenship is lost automatically |
Two points people miss:
- The foreign citizenship must go first. You cannot take the ORAL while still holding another nationality; you provide proof of renunciation at the oath.
- There is no extension, appeal, or grace period. Miss the 22nd birthday and the citizenship is gone, with no guarantee of any immigration facility afterwards.
Minors living overseas can usually take the oath at the nearest Singapore Overseas Mission rather than travelling back.
National Service and dual citizenship (male citizens)
For families with sons, NS is often the real deciding factor. The obligation does not wait for a decision at 21.
|
Age |
Obligation |
|
From 13 |
Becomes liable for NS, even if living abroad and holding another citizenship |
|
13 and above |
Needs an exit permit for overseas stays of three months or more |
|
Around 16.5 |
Must register for NS |
|
18 and above |
Enlists for full-time service at the earliest opportunity |
Living overseas does not remove the duty. Boys aged 13 to 16.5 seeking to stay abroad long term may need to post a substantial bond (commonly S$75,000, or 50% of combined parental gross annual income, whichever is higher). Staying overseas without a valid exit permit after registration age can carry fines and even imprisonment. Importantly, a male who has enjoyed the privileges of citizenship and has outstanding NS may have a later renunciation request refused.
How a Singaporean loses citizenship
There are four main ways citizenship ends.
|
Route |
How it happens |
|
Voluntary foreign naturalisation |
Taking up another country’s citizenship as an adult leads to loss of Singapore citizenship |
|
Exercising foreign nationality |
Acting on a foreign citizenship (for example voting abroad or routinely travelling on a foreign passport) can trigger deprivation |
|
Missing the age-22 deadline |
A dual-citizen minor who does not take the ORAL in time loses citizenship automatically |
|
Formal renunciation |
A voluntary application to give up citizenship, subject to conditions (see below) |
Renouncing Singapore citizenship
If you choose to give up Singapore citizenship, the basic conditions are:
- You are over 21.
- You already hold, or are assured of, another nationality (Singapore will not knowingly leave you stateless).
- You have no outstanding obligations that block it.
The application is filed with ICA for a small processing fee (around S$35), with a statutory declaration and an advisory note on the implications. Male applicants also complete a MINDEF advisory step, and a renunciation can be refused where NS duties are outstanding. Re-acquiring Singapore citizenship later is very difficult, so treat renunciation as close to permanent.
Renouncing a foreign citizenship to become Singaporean
Coming the other way, a successful citizenship applicant must shed every other nationality before becoming a Singaporean. The steps:
- Receive approval-in-principle on your citizenship application.
- Contact your current country’s embassy or authorities to renounce that citizenship. Procedures, timelines, and fees vary widely by country, and some make it slow or costly.
- Bring proof of renunciation to your Singapore citizenship ceremony and take the oath.
Because the foreign renunciation is outside Singapore’s control, start it early. It is the step most likely to delay an otherwise approved application.
What you give up: CPF, tax, and benefits
Renouncing Singapore citizenship has real financial knock-on effects.
- CPF. Your CPF account is closed on renunciation and you withdraw your savings. Processing takes several weeks, and closed-account funds earn commercial bank rates rather than the usual CPF rates.
- Tax. Singapore taxes on residency, not citizenship, so renouncing does not by itself create a tax event. If you later earn Singapore income as a non-resident, it is taxed at non-resident rates.
- Benefits. You lose the citizen-only advantages: voting, new HDB flat eligibility, the highest housing and healthcare subsidies, and the Singapore passport.
Can a Singapore citizen hold PR abroad? Can a PR hold dual citizenship?
Two common points of confusion, cleared up:
- A Singapore citizen holding permanent residence in another country is fine. PR is not citizenship, so foreign PR does not breach Singapore’s rules.
- A Singapore PR can keep their existing citizenship. PR status does not require renouncing anything. The renunciation requirement only kicks in if a PR goes on to apply for and obtain Singapore citizenship.
So the “no dual citizenship” line is specifically about holding two citizenships as an adult. For a fuller comparison, see our overview of the benefits of Singapore PR.
What this means if you are a PR planning citizenship
If you are a PR weighing the jump to citizenship, the renunciation requirement is the single biggest thing to plan around. Before you apply, think through:
- Whether you are ready to give up your current passport for good, given how hard re-acquisition is.
- Your home country’s rules, since some make renunciation slow, expensive, or restrictive.
- Knock-on effects on property, inheritance, business, and family in your other country.
- Sons and NS, if you have children, as their obligations begin young.
Typically you need to have held PR for at least two years before applying for citizenship. If you are still earlier in the journey, our guides on applying for Singapore PR and moving from Employment Pass to PR map out the steps.
How First Immigration can help
The dual citizenship rule turns a single question, “which passport do I keep?”, into a decision with tax, NS, and family consequences. First Immigration helps you weigh it properly:
- Assessing your readiness and eligibility for Singapore citizenship.
- Explaining how renunciation would affect your CPF, family, and home-country ties.
- Planning the PR-to-citizenship path with the right timing.
Talk it through with our consultants on the contact page before you commit either way.
Frequently asked questions
Does Singapore allow dual citizenship?
No. Singapore does not permit dual citizenship for adults. To become a citizen you must renounce all other nationalities, and taking up another citizenship as a Singaporean leads to losing your Singapore one.
Can a child hold dual citizenship in Singapore?
Yes, until age 21. A child born abroad to a Singaporean parent can hold two citizenships, but must choose one within 12 months of turning 21, or lose Singapore citizenship by their 22nd birthday.
What happens at age 21 for a dual citizen?
They have 12 months to renounce the foreign citizenship and take the Oath of Renunciation, Allegiance and Loyalty to keep Singapore citizenship. There is no extension, appeal, or grace period.
Can a Singapore citizen have permanent residence in another country?
Yes. Foreign permanent residence is not citizenship, so it does not breach Singapore’s rules.
Can a Singapore PR keep their original citizenship?
Yes. PR status does not require renouncing your current citizenship. Renunciation is only required if you go on to obtain Singapore citizenship.
How does National Service affect dual citizens?
Male citizens become liable for NS from age 13, regardless of a second citizenship or living abroad. They must register around 16.5 and enlist from 18. Outstanding NS can block a later renunciation.
How do I renounce Singapore citizenship?
Apply through ICA (over 21, holding another nationality), with a statutory declaration and advisory note, and a small processing fee. Male applicants complete a MINDEF step, and NS obligations can prevent approval.
What happens to my CPF if I renounce citizenship?
Your CPF account is closed and you withdraw your savings. Processing takes several weeks, and the closed-account funds earn commercial bank interest rates rather than standard CPF rates.
Why doesn’t Singapore allow dual citizenship?
It rests on single national allegiance, fair National Service obligations, and equal civic rights and duties for all citizens.
If I become a Singapore citizen, do I really have to give up my other passport?
Yes. Before the citizenship ceremony you must renounce every other nationality and show proof. There is no way to keep both as an adult.
