Singapore is one of the world’s largest ship registries and a major hub for ship management, ship financing, and maritime services. A big part of why ship owners and operators choose to flag and base out of Singapore is the country’s tonnage tax regime — a long-standing, statute-based exemption from income tax on qualifying shipping income.
This guide walks through how the regime works under Sections 13A and 13E of the Income Tax Act 1947, what income qualifies, what status a company needs to enjoy the exemption, and the practical compliance requirements for Singapore shipping companies in 2026.
The Big Picture: Why Singapore Has a Tonnage Tax Regime
Shipping income is inherently mobile — a vessel earning under a Singapore charter today can be repositioned to Hong Kong, Dubai, or Liberia tomorrow. Most major maritime nations therefore offer special tax treatment for shipping, either through a “tonnage tax” (flat charge based on vessel size) or a full exemption regime. Singapore took the latter approach.
Under Sections 13A and 13E, qualifying shipping income earned by Singapore-flagged or Singapore-resident shipping enterprises is exempt from Singapore corporate income tax. The regime works in combination with the Maritime Sector Incentive (MSI) administered by the Maritime and Port Authority (MPA), which extends similar treatment to non-Singapore-flagged vessels operating from Singapore.
The result: a Singapore shipping company that meets the criteria pays effectively zero income tax on its core operating revenue, while continuing to deduct expenses against any non-qualifying income.
Section 13A: Income from Singapore Ships
Section 13A exempts from tax the income of a shipping enterprise from the operation of Singapore-flagged ships. The key requirements:
- The shipping enterprise must be a company resident in Singapore
- The ship must be a “Singapore ship” — registered under the Merchant Shipping Act 1995, with a Singapore Registry number
- The income must be derived from operating the ship — carriage of passengers, mail, livestock, or goods (including operating in international waters and coastal trade where permitted)
Income covered includes freight, charter hire (time and bareboat), and incidental revenues such as demurrage. Capital gains from selling a Singapore ship are also exempt under Section 13A, provided the ship was used in the shipping enterprise.
Section 13E: Income from Foreign Ships
Section 13E extends similar treatment to qualifying Singapore companies operating foreign-flagged ships in international waters — that is, voyages not starting or ending solely in Singapore. The conditions:
- The company must be a Singapore tax resident
- The ship must be operated in international waters (not intra-Singapore voyages)
- The income must be from carriage of passengers, mail, livestock, or goods
Section 13E is what allows a Singapore-headquartered ship operator to manage a global fleet — Singapore-flagged plus Panama-flagged plus Liberia-flagged — and still enjoy Singapore tax exemption on the international-waters portion of revenue.
The MSI Awards Layered on Top
MPA’s Maritime Sector Incentive layers additional regulatory benefits on top of the statutory Sections 13A/13E exemption. The main awards in 2026 are:
| MSI Award | Target | Award Period |
|---|---|---|
| MSI-Shipping Enterprise (Singapore Registry of Ships) — MSI-SRS | Ship owners and operators of Singapore-flagged ships | 10 years, renewable |
| MSI-Approved International Shipping Enterprise — MSI-AIS | International ship owners/operators basing global headquarters in Singapore | 10 years, with possible 10-year extension |
| MSI-Maritime Leasing — MSI-ML (Ship) | Ship leasing companies | 5 years |
| MSI-Shipping-related Support Services — MSI-SSS | Ship brokers, freight forwarders, ship management, ship agents | 5 years (concessionary 10% rate, not full exemption) |
MSI-AIS in particular allows companies to receive Section 13E-style exemption for foreign-flagged operations along with concessionary 10% rates on related ancillary income — a significant attraction for international shipping groups consolidating Asia operations in Singapore.
Who Qualifies as a “Shipping Enterprise”
To benefit from Sections 13A/13E, the company must genuinely be a shipping enterprise — not a paper entity. IRAS and MPA both look for:
- Singapore tax residency — control and management exercised from Singapore, board meetings here, key decisions here
- Substantive presence — Singapore-based commercial, technical, or operational team. Pure brass plate operations will not qualify
- Bookkeeping and accounting in Singapore — separate ledger for qualifying vs non-qualifying income, audited annual financial statements
- Compliance with the Merchant Shipping Act — proper ship registration, manning, safety, and insurance
For ship-owning structures, this usually means a Singapore Pte Ltd as the registered owner of each vessel (often one ship per company for liability ring-fencing), with the operating company holding the relevant MSI award.
Worked Example
Facts: Marine Operator Pte Ltd is a Singapore-resident company holding an MSI-AIS award. In FY2026 it operates a fleet of 4 vessels — 2 Singapore-flagged and 2 Liberia-flagged — entirely in international waters. Gross freight earned: S$60 million. Vessel operating costs: S$45 million. The company also earns S$2 million in ship management fees from third-party owners.
Analysis:
- S$60 million freight from international-waters operations — exempt under Section 13A (Singapore ships) and Section 13E / MSI-AIS (foreign ships)
- S$45 million operating costs — not deductible against ordinary taxable income because they relate to exempt income
- S$2 million management fees — taxable at the concessionary 10% MSI-SSS rate if the company also holds that award, otherwise at full 17% corporate tax
Net corporate tax payable: S$200,000 (on the S$2 million management fees at 10%) versus S$2.55 million if the same group had been operated through Hong Kong or another non-shipping-incentivised jurisdiction. The saving is the value of MSI plus Sections 13A/13E.
Compliance Mechanics
1. Annual Tax Filing
Even though shipping income is exempt, the company must still file a Form C or Form C-S annually with IRAS, disclosing both exempt and taxable streams. Exempt shipping income is reported separately with statutory section references.
2. Segregated Books
IRAS requires the company to maintain separate accounts for qualifying shipping income and any other income streams. Common expenses must be allocated using a reasonable basis (typically vessel-days or revenue weighting). Failure to segregate is a frequent finding in IRAS reviews.
3. MSI Annual Reporting
MSI award holders must submit annual returns to MPA detailing fleet composition, headcount in Singapore, training spend, and substantive business activity. Failure to meet committed Singapore substance levels can lead to clawback of the award.
4. Ship Registry Compliance
Singapore Registry vessels must comply with the Merchant Shipping Act on manning ratios, safety management, and insurance. Annual ship surveys and class certification are mandatory.
Interaction with Other Tax Regimes
Singapore’s tonnage regime stacks well with other parts of the tax system:
- Double Tax Agreements — most of Singapore’s DTAs include a “shipping article” giving the operator’s resident state sole taxing rights over international shipping income. This means a Singapore shipping enterprise typically pays no foreign tax on foreign port calls. See our guide to Singapore DTAs.
- Withholding tax — payments to non-resident shipping companies operating Singapore ports are generally exempt from withholding under DTA shipping articles.
- Section 13Z share disposals — selling shares in a Singapore shipping company can also benefit from Section 13Z if the 20% / 24-month conditions are met. See our companion article on Section 13Z capital gains certainty.
Common Pitfalls
- Mixing exempt and non-exempt income. A shipping company that quietly takes on warehousing or non-vessel revenue without ringfencing risks losing exemption on the whole stream.
- Sub-substance. MSI-AIS awards in particular require meaningful Singapore staffing. Hollowing out the local team during a downturn can trigger MPA review.
- Letting MSI lapse. Awards must be renewed before expiry. Lapsed awards mean fall-back to ordinary tax — often a multi-million-dollar surprise.
- Intra-Singapore voyages. Section 13E only covers international waters. A Singapore-flagged tug doing harbour work is a different tax position from a Singapore-flagged bulk carrier on intercontinental voyages.
- Ship sale gains misreported. Section 13A exempts gains on Singapore ships used in the business, but only if the ship qualified throughout. Selling a Singapore ship that was off-charter or laid up for an extended period can be challenged.
Frequently Asked Questions
Can a foreign ship owner benefit from Section 13A?
Only if it operates through a Singapore tax-resident company and flags its vessel under the Singapore Registry. A foreign parent company holding a Singapore ship through a Singapore subsidiary can effectively access the regime — this is a standard structure.
Are crew salaries deductible?
Crew salaries relating to exempt shipping income are not separately deductible — they are part of the exempt computation. However, salaries of shore-based Singapore staff supporting non-exempt activities (such as ship management for third parties) remain deductible against that taxable revenue.
How long does it take to get an MSI award?
MPA processing typically takes 3–6 months for MSI-SRS and 6–12 months for MSI-AIS. Applicants should expect detailed questioning on business plan, fleet projections, headcount commitments, and training spend.
Does the exemption cover charter income from related parties?
Yes — but transfer pricing applies. Charter rates between related parties must be arm’s-length and supported by transfer pricing documentation.
Final Word
Singapore’s tonnage regime under Sections 13A and 13E, layered with MSI, is one of the most generous shipping tax regimes globally — and one of the most carefully policed. Substance, segregation, and award maintenance are the three things that separate companies that enjoy the regime from those that lose it on audit.
If you are planning to register or relocate shipping operations to Singapore, we can advise on the optimal structure, MSI application strategy, and ongoing compliance framework. Email [email protected].
— The Editorial Team, Raffles Corporate Services