skprop
Tools section · the maths most portals hide

The maths most portals hide.

Singapore property has more rules than a NS book-out form. We bake them into the listings, but here they are as standalone tools.

  1. 01

    HFE and TDSR calculator

    Pre-fill any listing price. Get HDB Flat Eligibility, TDSR, MSR, and the 4.0% stress-test result in one screen. CPF and ECHG included.

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  2. 02

    Launch vs resale comparator

    Every active new launch pitted against resale within 800m. PSF gap, projected rental yield, TOP timeline, opportunity cost of waiting.

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  3. 03

    CPF housing usage

    Project how much CPF Ordinary Account you can use against this exact lease tenure. Includes Basic Retirement Sum withdrawal limit at 55.

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  4. 04

    Lease decay graph

    Bala's table applied to any HDB. Resale price ceiling at each remaining-lease milestone. Compare to amortisation horizon.

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