How to Calculate Buyer’s Stamp Duty in Singapore
A practical guide to BSD rates, chargeable value, and the checks to make before you rely on a figure.
To calculate Buyer’s Stamp Duty in Singapore, first identify the higher of the purchase price or market value, then apply the BSD rates progressively to each value band and add the amounts together. As of 2026, residential BSD runs from 1% up to 6% above $3,000,000 (from 15 February 2023); verify the current schedule on IRAS. If valuation is not yet available or the deal structure is unusual, treat the figure as provisional and confirm the chargeable basis with IRAS or the conveyancing lawyer before you rely on it.
Buyer’s Stamp Duty (BSD) is a tax payable when property is acquired in Singapore. The rule to remember is simple: calculate BSD on the higher of the purchase price or market value, then apply the BSD bands progressively, slice by slice. The rates here are as of 2026 (top residential band from 15 February 2023); confirm the current schedule on IRAS before you rely on a figure.
What is Buyer’s Stamp Duty in Singapore, in plain terms?
Buyer’s Stamp Duty is the base tax paid when a buyer acquires property in Singapore. It is an upfront transaction cost and is separate from ABSD, legal fees, and financing costs.
In plain terms: BSD is the government stamp duty payable when you buy property in Singapore. The practical point is to treat it as part of your upfront cash requirement, not as a small admin fee to think about later.
BSD is the standard duty on the acquisition itself. If Additional Buyer’s Stamp Duty may also apply, that is a separate calculation and should be treated separately. If you need a broader overview, start with PropKaki’s Singapore Property Stamp Duty Explained and keep ABSD separate with ABSD Rates in Singapore.
For official references, see IRAS’ Buyer’s Stamp Duty page and MOF’s stamp duty overview.
Insight line: BSD is part of deal cost, not paperwork cost.
Work out the Buyer's Stamp Duty on your own price on the Property Financial Planner.
What is BSD charged on: purchase price, valuation, or the higher amount?
BSD is charged on the higher of the purchase price and market value. Do not rely on BSD from the agreed price alone if valuation could come in higher.
This is the rule that most often needs to be got right. In a standard transaction, BSD is calculated on the chargeable value, which is the higher of the purchase price and the property’s market value.
A simple way to see it is: BSD follows the bigger number, not the more convenient number.
| Scenario | Which figure BSD follows |
|---|---|
| Agreed price is lower than market value | Market value |
| Agreed price is higher than market value | Agreed price |
| Price and market value are the same | That common amount |
This matters in underpriced transfers, related-party transactions, and cases where you want a quick cost estimate before valuation is confirmed. If you work off only the transacted price too early, you risk understating your actual upfront cash requirement.
For wider context, tie this back to PropKaki’s Singapore Property Stamp Duty Explained. For a broader overview, see ABSD Rates in Singapore: Buyer Types, Property Count, and Who Pays.
How do you calculate BSD step by step?
Take the higher of the purchase price or market value, split that amount into the BSD bands, apply the rate for each slice, and add the slices together.
Use this workflow when you need a practical estimate:
- Confirm the chargeable value: purchase price or market value, whichever is higher.
- Split that figure across the relevant BSD bands.
- Multiply each slice by its band rate.
- Add the band amounts to get the total BSD.
That is the full calculation method for a standard purchase. The common mistake is to apply one flat percentage to the entire price.
At booking or OTP stage, when the market value is not yet known, treat the figure as an estimate based on current information that may change if valuation comes in higher. As of 2026, IRAS rounds BSD down to the nearest dollar and applies a minimum duty of $1, and the duty is generally payable within 14 days of the document being signed in Singapore; because these details are operational and date-sensitive, confirm them on the latest IRAS guidance before treating a figure as final.
Practical takeaway: if valuation is still unknown, under-estimating is usually a bigger risk than over-estimating. Note the basis you used. For a broader overview, see When to Pay Stamp Duty After Exercising the OTP in Singapore.
How do BSD rate bands work?
BSD is progressive, so each portion of the property value is taxed at its own rate. It is not one flat percentage on the full price.
Think of BSD as a stepped calculation. Each slice of value is taxed separately, which is why a higher-value property does not mean the entire price is taxed at the top band.
The schedules below apply to acquisitions on or after 15 February 2023 and are shown as of 2026. Because rate tables are policy-sensitive, confirm the current schedule on IRAS before you rely on a final figure.
| Property type | BSD schedule (as of 2026) |
|---|---|
| Residential | 1% on the first $180,000; 2% on the next $180,000; 3% on the next $640,000; 4% on the next $500,000; 5% on the next $1,500,000; 6% on the amount above $3,000,000 |
| Non-residential | 1% on the first $180,000; 2% on the next $180,000; 3% on the next $640,000; 4% on the next $500,000; 5% on the remainder |
The useful distinction is residential versus non-residential. Do not assume all property categories use the same top band. Before you rely on a firm number, check the latest IRAS BSD page or stamp duty rates page.
Insight line: BSD is a banded calculation, not a shortcut percentage. For a broader overview, see How to Pay Stamp Duty in Singapore: IRAS Filing and Payment Workflow.
How do you calculate BSD for a real example?
Start with the higher-of-price-or-value rule, then calculate each BSD slice separately. The example matters because many buyers assume BSD follows only the agreed price.
Here is a simple illustrative residential example.
Assume the agreed purchase price is $1.20 million, but the market value is $1.25 million. BSD is calculated on $1.25 million because that is the higher figure.
Using the residential schedule described in the source material above:
- 1% on the first $180,000 = $1,800
- 2% on the next $180,000 = $3,600
- 3% on the next $640,000 = $19,200
- 4% on the remaining $250,000 = $10,000
Estimated BSD = $34,600.
The lesson is not just the arithmetic. The more important point is that the value basis changed the duty. If the buyer had budgeted BSD using only the $1.20 million agreed price, the estimate would have been too low.
A simple way to put it: first confirm which amount BSD is charged on, then apply the bands. If the basis moves, the tax moves too.
This is an illustrative example, not an official IRAS worked example. For a broader overview, see Which Property Documents Need Stamp Duty in Singapore?.
What are the common mistakes when working out BSD?
The biggest mistakes are using the wrong value basis, treating BSD like a flat rate, and mixing BSD up with ABSD or small upfront fees.
BSD follows the chargeable value, not the most convenient figure.
Common mistakes:
- Using the agreed price when market value may be higher
- Applying one percentage to the full amount instead of banding the calculation
- Mixing BSD together with ABSD in one number
- Assuming BSD is based only on the option fee or booking fee
If the case looks straightforward, an estimate is usually fine for an early conversation. If the structure is unusual, re-check before you commit. For a practical list of stamp duty traps, EdgeProp’s common mistakes guide is a useful secondary read after the official IRAS pages.
When should you verify the amount with the official source instead of estimating?
Verify the figure when price and valuation differ, when the property type is unclear, or when the deal is not a standard straightforward purchase.
Move from estimate to verification when the transaction stops being plain vanilla. Typical triggers include:
- The agreed price and market value do not match
- The transfer is between related parties
- There is partial or unusual consideration
- The property has mixed-use or non-standard characteristics
- The buyer wants a precise cash figure for commitment planning
A practical workflow is:
- Confirm the likely chargeable basis first.
- Check the latest BSD schedule on IRAS.
- If the structure is unusual, ask the buyer to verify with the conveyancing lawyer before relying on the figure.
This is less about being overly cautious and more about avoiding underquoting at the worst moment. If you also need the operational side, see PropKaki’s How to Pay Stamp Duty in Singapore and When to Pay Stamp Duty After Exercising the OTP.
How does BSD fit into your upfront cash planning?
BSD is one of your upfront acquisition costs, alongside legal fees, ABSD if it applies, and other completion expenses — budget for it on top of the downpayment.
Buyers often focus on the property price and loan, then underestimate how much cash they need around the transaction. BSD should be presented as part of the full acquisition budget, not as an isolated tax figure.
This is especially important when the buyer is stretching affordability, comparing multiple units, or still waiting for valuation confirmation. In those cases, the better conversation is not just "here is your BSD" but "here is your likely upfront cost stack."
A practical way to frame it: the purchase price is only one part of the deal cost. Stamp duties, legal fees, and completion expenses also need to fit your cash plan.
For supporting reading, PropKaki’s Which Property Documents Need Stamp Duty in Singapore? helps explain what gets stamped, while PropertyGuru’s guide to hidden buying costs is useful when buyers need a broader budget conversation.
Insight line: A buyer rarely gets into trouble because of the math alone. More often, they get into trouble because they planned only for price, not total deal cost.
Is BSD calculated on the option fee, booking fee, or total purchase price?
BSD is calculated on the full consideration or purchase price, not just the option fee or booking fee. If market value is higher than the agreed price, the higher value governs instead.
Option fees and booking fees are only part-payments toward the transaction. They are not, by themselves, the amount used to calculate BSD.
The easiest way to see this is with a quick contrast:
| Amount paid upfront | Is this the BSD base? |
|---|---|
| Option fee or booking fee alone | No |
| Full agreed purchase price | Yes, unless market value is higher |
| Market value higher than agreed price | Yes, BSD follows this higher amount |
This is why paying a small initial sum still leaves BSD to budget for on the full deal value. To avoid confusion, remember: the fee you pay first is not the same thing as the value stamp duty is charged on.
Methodology and sources
Where every figure comes from — and what we deliberately did not claim.
Verified figures. Stamp-duty figures here come from IRAS (and MOF where noted) — as of 2026; confirm the current rate/rule on IRAS before you rely on it.
What we have not claimed: the exact duty for any specific transaction (compute it on IRAS); any scheme to avoid duty; or a legal ruling — a practical explainer, not legal advice.
Got a question this raised? Ask PropKaki.
Take any point from this analysis and apply it to your own project, budget or decision.
PropKakiFor most buyers this year, staying well within budget beats trying to time the market.