At a glance: 2025 vs 2026 corporate tax landscape
Singapore's corporate tax framework undergoes a notable shift between 2025 and 2026, driven by global minimum tax adoption and domestic policy recalibration. In 2025, the headline corporate income tax rate remains a flat 17%—among the lowest in the developed world—with a robust suite of partial tax exemptions, productivity grants, and sector-specific incentives. The 2026 reforms, however, introduce the Multinational Enterprise (MNE) Top-Up Tax under Pillar Two of the OECD/G20 Inclusive Framework, effectively raising the effective tax rate for large multinational groups to 15% from 2025's base. Additionally, the Refundable Investment Credit (RIC) scheme is enhanced, while certain legacy incentives are phased out. For most SMEs and domestic firms, the 17% rate stays unchanged, but compliance obligations expand for groups exceeding €750 million in annual revenue. This comparison unpacks the key differences across pricing, ease of use, integrations, support, and strategic fit.
Feature-by-feature comparison
Pricing and tax rates
In 2025, Singapore's corporate tax system offers a straightforward 17% flat rate on chargeable income, with a 75% exemption on the first S$100,000 and a 50% exemption on the next S$100,000 for new companies in their first three years. Effective rates for small firms can dip below 8%. For 2026, the headline rate remains 17% for all resident companies, but the MNE Top-Up Tax imposes a 15% minimum effective tax rate for qualifying multinational groups—any shortfall between the domestic rate and 15% is topped up via a new domestic top-up tax (DTT). This means large MNEs face a de facto higher burden. The RIC scheme, introduced in 2025 as a refundable tax credit, sees expanded eligibility in 2026, covering more capital-intensive investments in green tech and digitalisation, with a maximum credit rate of 50% of qualifying expenditure, refundable in cash after four years if unutilised.
Ease of use and compliance
The 2025 regime is relatively light on compliance: annual corporate tax filing via Form C or C-S (for small companies) is straightforward, with e-filing through myTax Portal. Most SMEs can self-file with minimal professional help. The 2026 reforms introduce significant complexity for MNEs: mandatory Country-by-Country (CbC) reporting thresholds tighten, and the DTT requires detailed calculations of effective tax rates per jurisdiction, including adjustments for deferred tax and substance-based carve-outs. The Inland Revenue Authority of Singapore (IRAS) has published draft guides, but the administrative burden for groups with cross-border operations increases markedly. For domestic SMEs, compliance remains largely unchanged, though the RIC requires upfront application and project tracking—a moderate learning curve for firms unfamiliar with incentive schemes.
Integrations and incentives
2025's incentive ecosystem includes the Development and Expansion Incentive (DEI), Investment Allowance, and sector-specific schemes for financial services, maritime, and tech. These are integrated with IRAS's online portal and can be layered with partial tax exemptions. In 2026, the DEI is streamlined but its scope narrows: new applications must align with the 2024 Economic Growth and Innovation Strategy, prioritising high-value R&D, advanced manufacturing, and sustainability. The RIC becomes a central tool, replacing some older capital allowances. Integration with other government agencies—EDB, ESG, and NRF—is enhanced via a single digital gateway, but the application process for the RIC requires more detailed feasibility studies and impact projections, particularly for projects claiming the 50% credit rate. For non-MNEs, the key change is the sunsetting of the Productivity and Innovation Credit (PIC) scheme, fully replaced by the RIC and other grants by end-2025.
Support and guidance
IRAS offers extensive support in both 2025 and 2026: online guides, webinars, and a helpline. In 2025, the focus is on compliance for SMEs, with free e-learning modules. For 2026, IRAS has launched a dedicated Pillar Two readiness unit, offering pre-filing consultations for MNEs, but these are only available to groups that register early. The Economic Development Board (EDB) also provides case management for large investors, though smaller firms may find the RIC application process less supported, relying on external tax advisors. Overall, support quality remains high, but the 2026 shift demands more proactive engagement from multinationals, while SMEs see little change in available assistance.
Best for
The 2025 regime is best suited for SMEs, startups, and domestic-focused enterprises that benefit from the low headline rate and simple exemptions. It also favours MNEs with annual revenue below €750 million, as they avoid Pillar Two complexities. The 2026 reforms are optimal for large multinationals willing to invest in compliance infrastructure and leverage the enhanced RIC for capital-intensive projects. Policymakers and analysts tracking APAC tax trends will find 2026 a pivotal year, as Singapore aligns with global minimum tax norms while retaining competitiveness for high-value activities. For consultants advising clients on regional expansion, the 2025 system offers predictability, while 2026 demands scenario planning for effective tax rate impacts.
Verdict: which one for whom
For the majority of Singapore-based businesses—especially SMEs and local firms—the 2025 regime remains more favourable due to its simplicity and low effective rates. The 2026 reforms primarily affect large multinational groups, increasing compliance costs and effective tax burdens, though the enhanced RIC provides a counterbalance for firms investing in strategic sectors. Analysts and executives should view the transition as a bifurcation: the domestic market stays largely unchanged, while the international segment faces a new compliance reality. Policymakers in the APAC region will watch Singapore's implementation closely as a bellwether for Pillar Two adoption. For businesses planning regional headquarters in Singapore, the 2026 changes argue for early engagement with IRAS and a thorough review of group structure to optimise the DTT and RIC. In short, 2025 is the status quo; 2026 is the new normal for MNEs, but not for the broader corporate landscape.