Online tools

Calculators that do the maths for you, so you can spend your energy on the decisions instead of the arithmetic.

Free for everyone

No account, no sign-up. Just for fun, and maybe a small wake-up call.

Your daily coffee, brandy number 11 or that wedding. See what they’d grow to if you invested the money instead. Prepare to be mildly offended.

Create a free Trainee account and these are yours. Home buying, plus a trip and fuel cost calculator for the friend who never pays for petrol.

What will the bond repayment be, how much goes to the bank, and what are the once-off transfer and bond costs?

Start with your income and expenses and see what home you can afford, plus the cash you need on day one.

What will the trip cost in fuel and tolls, and what does everyone owe? Official fuel prices, updated every month.

Want these on your phone, like an app? Members get TIE Tools on their home screen, one tap away.Become a Member and see how →

All five Member tools are live. Got an idea for the next one? Tell us below.

Monthly instalment, balloon payment, bank fees and the true total cost, so the shiny new car does not surprise you later.

Scan the restaurant slip, tap who had what, add the tip and send everyone their share. No more “I only had a salad” debates.

How much to put away each month to hit your goal by a date, with interest doing some of the work.

Watch what time and a steady monthly amount can do. The most exciting boring maths there is.

Start with the retirement you want and work backwards: the pot you’ll need and what to save each month, level or increasing every year.

Tell us which calculator would make your life easier and we will bump it up the list.