Practical guides

Guides

Plain-language articles that explain the formulas, assumptions and real-world factors behind the calculators.

How to Create a Monthly Budget

A practical method for building a budget from real statements rather than optimistic guesses.

Why a percentage target beats a fixed amount, and how to choose one you can actually hold.

The inputs that decide the comparison, and the costs people leave out of the buying side.

Purchase price is the smaller half. Here is how to price the rest of ownership.

From the wattage on a label to the number on your bill, step by step.

What payback period really measures, and the assumptions that move it by years.

Tuition is the headline. Living costs, fees and lost income complete the picture.

Build a trip budget in the order costs are committed, and keep a buffer you never touch.

How amortisation works, why early payments are mostly interest, and what term length costs.

Work backwards from take-home income through fees, tax and honest billable hours.