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IRAS

The Stamp Duty calculator API enables you to check the amount of stamp duty payable for the different document types (e.g. Property transfer, lease, share transfer, mortgage, etc.)

Note: The calculator API provides only estimates based on the stated assumptions and your inputs. It may not provide for all possible scenarios.

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The APIs allow accounting software developers to incorporate within their accounting software the feature for authorised taxpayers to validate and submit GST information (GST Returns, Transaction Listings) to IRAS directly.