Residential tenancies in Singapore are governed largely by common law and the law of contract rather than a single tenancy statute. There is no general rent control and no equivalent of a UK-style assured tenancy regime, so the written agreement carries most of the weight. The Conveyancing and Law of Property Act 1886 governs how interests in land are dealt with, while title to most land is registered under the Land Titles Act through the Singapore Land Authority. For short residential terms, the parties' freedom to contract is wide, which is precisely why a precise, well-drafted document matters more here than in jurisdictions with statutory tenant protections to fall back on.
Two compliance points are non-negotiable. First, stamp duty under the Stamp Duties Act. A tenancy of one year or more must be stamped through IRAS, with duty calculated at 0.4% of the total rent payable over the term for leases of up to four years, based on the higher of contractual or market rent. A tenancy with an Average Annual Rent of S$1,000 or less is exempt. The agreement must be e-stamped within 14 days of signing in Singapore, or 30 days if signed overseas, and an unstamped instrument is not admissible in evidence until the duty and any penalty are paid. Late stamping draws a penalty rising from a nominal amount to several times the duty as the delay grows. By market convention the tenant pays, but landlord and tenant are jointly liable, so the agreement should state who bears it. You can confirm the current rates on the official IRAS lease duty guidance for tenancy agreements.
Second, public-housing rules. HDB flats fall under the Housing and Development Act and HDB's subletting framework, not ordinary conveyancing, and the Residential Property Act restricts foreign acquisition of landed property. These sit on top of the contract, never instead of it.