Singapore Corporate Tax and GST

Company tax and GST basics for Singapore startups, before you ask an accountant.

Also known as: Singapore corporate tax, Singapore GST, SG tax basics

Singapore taxes companies on income at a flat headline rate, with startup exemptions easing the early years, and levies GST (Goods and Services Tax) on domestic consumption past registration thresholds. The system rewards clean compliance: straightforward rules, digital filing, and penalties for drift. Know the shape; confirm the numbers yearly with your accountant — rates, thresholds and reliefs move.

shape:  corporate tax on profits (headline rate minus startup reliefs) + GST past thresholds
        + withholding on certain cross-border payments + employer filings
rhythm:  bookkeeping monthly → estimated assessments → filings on schedule → audits if triggered

Startups trip most often on three things: GST registration timing (cross it unregistered and owe tax you never collected), cross-border payments (withholding and treaty questions mirror Indonesia’s PPh logic), and director-level compliance (resident filings, ACRA-linked standing).

The classic mistakes:

Pricing GST-blind. B2C prices must absorb or display correctly; B2B contracts must state treatment. Decide before registration forces rushed repricing.
Reliefs unclaimed. Startup exemptions and scheme reliefs require election and documentation — free money left on tables out of ignorance. Review eligibility yearly.
Cross-border improvisation. Paying foreign vendors, receiving regional revenue, holding IP offshore — each has treatment. Map flows with advice covering both sides before volume grows (transfer pricing looms at scale).
Books that cannot file. Growth without bookkeeping discipline produces year-end reconstruction under deadline. Monthly close from incorporation (bookkeeping).

The stance: learn the shape from this page, run the numbers with an accountant, keep books that file on demand. Singapore rewards the compliant and fines the drifters — be the former on purpose.