Decision Tools

Run the numbers before you decide.

DecisionLab provides online tools that help you evaluate financial and everyday decisions using simple data models.

Energy Decisions

Evaluate major household energy investments before spending capital.

Solar Payback Calculator

Estimate how long it will take for a solar installation to pay for itself and how much you could save over time.

Open Solar Payback Calculator

Property Decisions

Understand the long-term financial impact of buying, renting, and property ownership.

Rent vs Buy Property Calculator

Compare the financial outcome of renting versus buying a home over your chosen time period.

Open Rent vs Buy Calculator

Transport Decisions

Compare the real cost of cars, fuel, financing, and ownership before committing.

EV vs Petrol Cost Calculator

Compare the running costs of electric and petrol vehicles based on your driving habits and local energy prices.

Open EV vs Petrol Calculator

Should I Buy This Car?

Calculate the true total cost of car ownership including finance, fuel, insurance, maintenance, and resale value.

Open Car Ownership Calculator

Car Affordability Calculator

Work out the maximum car price you can realistically afford based on your income and total monthly ownership costs.

Open Car Affordability Calculator

Wealth & Money

Understand your long-term financial future and make better money decisions.

How Rich Could You Be?

Estimate how much wealth you could build over time based on your age, current investments, monthly contributions, and expected returns.

Open Wealth Calculator