PROPERTY
INVESTMENT GURU See profit ↓
Property flipper toolkit

Know your costs.
See your profit.

Run the deal forward from purchase price to resale value, then follow each step as GST, project costs, finance, and income tax reduce the final profit.

The forward deal equation
Net resale-Net purchase- Project costs=Profit after tax

Designed to show where the money goes, not just the final number.

01 / Inputs

Run the deal

Property deal
Saved deals stay in this browser.
GST and tax
GST-registered property traderCalculates output GST on sale and credits on GST-inclusive project costs.
Purchase price includes claimable GSTRemoves claimable GST from the purchase cost before calculating profit.

Reference: Inland Revenue GST guidance. GST on property can depend on registration, land use and whether a transaction is zero-rated.

Purchase and resale

Default income tax rate references Inland Revenue's 28% rate for most companies. Purchase price, resale value and timing are user-entered assumptions.

Renovation costs
Other project costs
Costs of sale
Holding and finance

Use monthly costs when timing matters, or totals when you already know the full allowance.

03 / Saved workspace

Compare profit scenarios

Save several properties, then compare expected profit, GST, costs, project length, and return side by side.

0 saved deals
No saved deals yet. Add an address above and save the current calculation to begin comparing profit scenarios.
Companion calculator

Need to work backward?

If you know the profit you want to keep and need to find the maximum purchase offer, use the offer calculator instead.

GST reference: Inland Revenue Company tax reference: Inland Revenue Costs, purchase price, resale value, project length and finance costs are user-entered assumptions.
Open offer calculator ->