Free Investment Planning Tool
Tiny Home Investment Return Calculator
Estimate the potential income, expenses, rental yield and payback period of adding a tiny home, granny flat or modular home to your property.
Adjust the figures to compare different homes and rental scenarios. Results update automatically.
The starting figures are illustrative planning examples, not current prices, rental appraisals or finance offers. Replace them with local quotes and achievable rental estimates. All amounts are AUD.
Your estimated returns
Yields and project payback use the total project cost, including any upfront loan establishment cost. Simple payback ignores growth, resale value and the timing of cash flows. Cash-on-cash return uses the buyer’s cash invested.
10-year income and cash flow projection
Gross rent assumes 52 rented weeks. Effective rent allows for vacancy. Net operating income also includes other annual income, held constant. Cumulative cash flow excludes your initial cash investment, tax and resale proceeds.
Rent grows at your entered rate; fixed operating costs grow at the expense growth rate. Management and booking percentages stay fixed and apply to effective rent. Finance starts at the beginning of Year 1. An interest-only loan is repaid in full at the end of its term; that final principal payment is included in cash flow.
Projected annual cash flow
Bar length shows the size of each amount. Positive amounts are green; negative amounts carry a minus sign and warning colour.
Compare your scenarios
Save your current figures as Conservative, Expected or Optimistic. To edit a saved scenario, load it, adjust the inputs and save it again. Saving replaces that slot.
Your inputs and scenarios are saved only in this browser. Reset restores the example inputs and keeps saved scenarios.
Want Help Assessing the Real Potential of Your Property?
Online calculators are a helpful starting point, but actual costs, approvals and rental potential depend on your property, location and chosen home. Tell us what you are considering and we’ll help you explore the next steps.
Get a Free Property AssessmentExplore tiny home income and expenses
Our tiny home ROI calculator for Australia helps you compare project quotes and rental assumptions. As a tiny home rental yield calculator or granny flat investment calculator, it shows how running costs and finance affect income and the estimated tiny home payback period.
Land purchase, existing mortgage repayments, tax, depreciation, capital growth, sale costs and costs not entered are excluded. Check comparable local rentals before choosing a rent or occupancy estimate. Break-even figures include entered other income and adjust percentage fees as rent changes.