Free tools & resources
Making the maths obvious.
11 free calculators. No sign-up, no nonsense.
InvestingInvestment calculator
See what waiting is really costing you.
Open the calculator
SavingLoyalty tax calculator
Find out what staying put is costing you.
Work out my loyalty tax
FamilyJunior ISA calculator
What a few pounds a month becomes by 18.
See the 18th birthday number
InvestingFund fees calculator
A 1% charge does not sound like much.
See what fees cost me
PensionsPension match calculator
The pay rise you have to ask for.
Check my employer match
SpendingSubscription calculator
Add up the small stuff. Brace yourself.
Add up my subscriptions
SavingPremium Bonds calculator
The odds, honestly.
Compare Premium Bonds
SavingInflation calculator
What your cash is quietly losing.
See what inflation takes
PensionsState pension top-up calculator
One of the best-value buys in personal finance.
Check a top-up year
FamilyChild Benefit calculator
The tax charge nobody explains properly.
Check my Child Benefit
SpendingMortgage overpayment calculator
A hundred a month, years off the end.
See my overpaymentAll 11 calculators, free and open to anyone. Join the newsletter to hear first when a new one lands.