Investment Calculators

Free tools to help you plan your child's financial future

Future Builder Calculator

See how much your child's investments could grow to by age 18. Includes Junior ISA and Junior SIPP projections with tax relief calculations.

See how much the government's 25% bonus on Junior SIPP contributions could grow to by retirement. Calculate lifetime value of free government money.

Birthday money or a grandparent's lump sum — see what a single gift could become by 18, 21, 30 and retirement.

Junior ISA, Junior SIPP, savings accounts and Premium Bonds side by side — limits, access ages, tax treatment, pros and cons.