A residential tenancy in Singapore operates largely under common law, framed by the Conveyancing and Law of Property Act 1886, which governs how interests in land are created and dealt with. There is no general statutory rent control, so the rent on renewal is whatever the parties agree; the discipline comes from the contract itself and from the tax that attaches to it. The single most misunderstood obligation is stamp duty. Under the Stamp Duties Act 1929, administered by IRAS, a lease or tenancy document is a chargeable instrument, and a renewal is treated as a fresh document for that purpose. The duty on the renewed term must be paid within fourteen days of signing if the document is signed in Singapore, or thirty days if signed overseas. The lease duty rate is 0.4 percent, applied to the Average Annual Rent over the renewed term, taken as the higher of the contractual rent or the open-market rent.
Where a renewal only extends the term while raising the rent, the position splits. A clean new term is stamped as a fresh lease. A mid-term change to the rent or duration of a lease still in force is stamped as a Variation of Lease, and IRAS charges duty on the incremental rent, not the whole. IRAS confirms that additional stamp duty is payable on any document that increases the rent, even where the original lease was already stamped. The authoritative reference for rates, deadlines and the correct transaction type is the IRAS guidance on stamp duty for renting a property in Singapore, which every landlord should check before selecting a stamping category.
The consequence of skipping this is precise and painful. An instrument that has not been duly stamped cannot be admitted in evidence in court proceedings until the outstanding duty and any penalty are cleared. The renewal does not become void, but its evidential value evaporates at the exact point a landlord wants to enforce arrears or a tenant wants to challenge a deposit deduction. Practitioners treat the tenancy stamp duty pack for IRAS filing as a companion to any renewal, because the renewed term needs its own certificate on file.