Singapore granted approximately 22,766 citizenships in 2024, with policy direction signalling a steady annual run-rate in the years ahead. For most successful applicants, the most consequential question is not whether they will be approved — it is what they have to give up. Singapore does not allow dual citizenship for adults, which means renouncing foreign citizenship is a hard precondition for swearing the oath as a Singaporean.

The mechanics are simple in summary: renounce, then take the oath. The complications sit in the order of those steps, the home-country renunciation rules (which vary widely), and the financial, family and tax consequences of giving up a passport that may have been carried for a lifetime. This guide is a practical, ICA-aligned walk-through for 2026 applicants.

Why Renouncing Foreign Citizenship Is Required

Per the Immigration & Checkpoints Authority, Singapore does not recognise dual citizenship for its adult citizens. The legal architecture is the Singapore Constitution and the Citizenship-related provisions, which require an applicant for naturalisation to take an oath of renunciation, allegiance and loyalty. The renunciation is not a side ceremony — it is part of the citizenship process itself.

Two practical implications follow. First, an applicant cannot stage their citizenship grant against their home-country renunciation in a way that creates a stateless gap. ICA times the oath ceremony so that the applicant is not without a passport for an extended period. Second, where the home country does not let a citizen renounce (rare but real — North Korea, Iran for some categories, certain inheritance-of-citizenship situations), the applicant has to surface that early, because Singapore will then treat the case under specific exception rules.

Children born with two nationalities are a separate track. Under Singapore law, children with multiple citizenships are required to elect by age 21 whether to retain Singapore citizenship. That decision sits alongside National Service obligations for males, which begin to crystallise from age 18 onwards.

The Sequence: When Does Renunciation Actually Happen?

This is the single most misunderstood part of the process. Renunciation is required after the In-Principle Approval (IPA) for citizenship is issued and before or at the citizenship confirmation appointment. It does not happen at the application stage.

The typical sequence:

  1. Submit Singapore citizenship application — usually after qualifying as a PR for at least two years, with the eligibility tests covered in our From PR to Singapore Citizen guide.
  2. ICA processes the application under the holistic assessment criteria; the rubric overlaps with PR assessment and is summarised in our ICA Holistic Assessment piece.
  3. If approved, ICA issues an IPA letter and instructs the applicant to begin home-country renunciation, gather supporting documents, and book a confirmation appointment.
  4. The applicant renounces their foreign citizenship through their home-country authority. Documentary evidence is brought to ICA.
  5. At the citizenship ceremony, the applicant takes the Oath of Renunciation, Allegiance and Loyalty, surrenders the foreign passport (if not already collected by the home authority), and receives a Singapore identity card and the right to apply for a Singapore passport.

Doing this in the wrong order — for example, renouncing before IPA in the hope of strengthening the application — is unnecessary and exposes the applicant to a stateless interval. ICA will not accept early renunciation as a positive factor.

Country-by-Country Renunciation Rules to Watch

The home-country path is where most of the friction lives. Below is a high-level country sketch — applicants must verify with home-country counsel because rules change, but the patterns are stable.

  • People’s Republic of China. The PRC does not allow dual citizenship. Acquiring Singapore citizenship automatically results in loss of PRC citizenship under PRC nationality law, and a separate exit-from-household-registration process is required to formalise it. The hukou cancellation matters for property holdings and family-line records.
  • India. India also does not allow dual citizenship. Indian applicants must renounce by surrendering the Indian passport at a designated Indian mission, and can subsequently apply for Overseas Citizen of India (OCI) status to retain certain rights of stay and limited property ownership in India. OCI is not citizenship; it does not confer voting or political rights.
  • Indonesia. Indonesia’s nationality law generally does not allow dual citizenship for adults; renunciation is processed via the Ministry of Law and Human Rights, and the Indonesian passport is surrendered. Inheritance and property timing in Indonesia merits separate attention.
  • Philippines. Filipinos who naturalise abroad lose Philippine citizenship by operation of law, but the Citizenship Retention and Re-acquisition Act 2003 allows reacquisition after the fact. Singapore’s position remains that the applicant must renounce — reacquisition under home-country law afterwards is a home-country matter, not a Singapore matter, and quietly reacquiring Philippine citizenship would put the new SC at risk if discovered.
  • United States. The US permits dual citizenship in principle, but US citizens who renounce trigger a formal process at a US consulate, including the “expatriation tax” rules under IRC §877A for high-net-worth individuals. Tax counsel should be engaged before renunciation, not after.
  • United Kingdom. The UK permits dual citizenship — but Singapore does not, so a UK national becoming Singaporean must still renounce British citizenship via the Home Office (Form RN). The UK process takes several months and a substantial fee.
  • Australia, Canada, New Zealand. All three permit dual citizenship from their side, and renunciation is handled via standard departmental forms with documentary proof of the new citizenship. Surrendered passports are returned cancelled.

The sequencing trap to avoid: most home countries require proof of acquisition of Singapore citizenship before processing the renunciation, while Singapore expects the renunciation to be evidenced before or at the oath ceremony. ICA accommodates this by accepting the IPA letter as sufficient proof for home-country authorities, and home authorities generally accept it. Where they do not, the applicant signs a renunciation undertaking and completes the home-country step within an agreed window after the oath.

National Service Obligations for Male Applicants

The renunciation rules are not symmetric across genders. Per ICA, the Government may reject a male applicant’s renunciation of Singapore citizenship — and by extension scrutinise the original PR-to-citizen path — where he has enjoyed citizenship privileges, including possession or use of the Singapore passport, and has outstanding National Service liabilities under the Enlistment Act 1970.

For PR-to-citizen converters, this matters in two ways. First, male PRs who left Singapore without serving NS will find their later applications (whether for citizenship, work passes, or even long-term stays) materially harder. Second, parents of male children should plan the citizenship application timing carefully — NS liability typically begins to attach from age 13 (registration) and crystallises around age 18 (enlistment).

Default penalties under the Enlistment Act 1970 for NS evasion include a fine of up to SGD 10,000, imprisonment of up to three years, or both. Practical reputational and immigration consequences extend across the family — sponsorship of dependants and renewals of related passes are affected. Our analysis of why work pass appeals fail includes NS-related cases as a recurring theme.

Tax, Inheritance and Property Trade-Offs

Renouncing foreign citizenship is not just an immigration move — it is an estate-and-tax move. The cross-border issues to think through:

  • US expatriation tax. Where the renouncing US national is a “covered expatriate” (broadly, net worth above USD 2 million or average tax liability above the IRC §877A threshold), a deemed-disposition exit tax applies. This is a one-time tax on unrealised gains that needs careful pre-renunciation planning.
  • Inheritance and beneficiary status. Some jurisdictions limit inheritance, succession, or pension rights to citizens. Renouncing can extinguish those rights for the renouncer (though usually not for their existing children).
  • Property ownership. Indian, PRC, and Indonesian property holdings have citizenship-linked ownership rules that may require pre-renunciation transfers or restructurings. In Singapore, the parallel question is whether the new citizen plans to buy residential property under more favourable Stamp Duty terms — our piece on buying property in Singapore as a foreigner explains the foreigner-rate baseline that Singapore citizenship moves you off.
  • Pensions and social security. US Social Security, UK State Pension, and home-country provident funds have continuity rules that depend on residency more than citizenship — but a few do hinge on citizenship and merit a check.

For high-net-worth applicants and family-office principals, this is precisely the layer where coordination across pass, citizenship, tax and estate counsel pays off. The corporate and trust structures that often run alongside a relocation are addressed in our family office hiring guide, with adjacent corporate-services support from Raffles Corporate Services.

Children Caught Mid-Process

Where parents apply for citizenship together with minor children, ICA processes the children under the parent’s application. The renunciation question for the child depends on home-country law — some countries require a parent or guardian to renounce on the child’s behalf; others auto-strip on grant of foreign citizenship; a few preserve the child’s right to elect at majority. Where the child holds two passports at the moment of the oath, ICA expects the foreign passport to be surrendered at the ceremony.

For children born in Singapore to PR or SC parents, the more common dilemma is the reverse: a Singaporean child holding a foreign citizenship by descent who must elect by age 21. The election requires the child to renounce the foreign citizenship and confirm Singapore citizenship in the year before the deadline. Failing to do so is treated as a deemed renunciation of Singapore citizenship in some scenarios.

The Oath Ceremony

The Oath of Renunciation, Allegiance and Loyalty is taken in person at ICA. The text of the oath includes an explicit renunciation of any other citizenship and an undertaking of allegiance to Singapore. After the oath, the applicant collects a Citizenship Certificate, applies for a Singapore identity card, and can apply for a Singapore passport. Our guide to the citizenship oath ceremony walks through what to bring on the day and what changes the next morning at the SingPass and CPF level.

How LBEA and the RCS Group Help

Little Big Employment Agency is a MOM-licensed employment agency (Licence 19C9790) that supports foreign professionals through the full trajectory — Employment Pass, PR, and citizenship. We coordinate the documentary side, prepare the holistic-assessment narrative, and guide applicants through the renunciation sequencing without creating stateless gaps. Where the applicant’s tax or estate position is non-trivial, we work alongside Raffles Corporate Services on the corporate, accounting and trust questions, and we triangulate with home-country counsel where required.

If you are at IPA stage, considering renunciation, or unsure whether a male child’s NS position complicates a family application, please contact Singapore Employment Agency. We will sit down with the IPA letter, your home-country position, and your family timeline, and map a sequence that keeps every party — ICA, the home authority, and the family — on the same page.

— The Editorial Team, Little Big Employment Agency

Other Related Posts