Tools
Free calculators and interactive tools from Rational GB.
All Tools guides & reviews
Tools
Investment Platform Fee Calculator UK: Percentage vs Flat Fee
Free UK investment platform fee calculator: enter your pot size and we work out the yearly cost on Trading 212, InvestEngine, Vanguard, AJ Bell, HL and interactive investor, ranked cheapest first.
Tools
Investment Growth Calculator UK: Project Your ISA or SIPP Pot
A UK investment growth calculator that projects your ISA or SIPP pot from a starting sum and monthly contributions, with fees and inflation deducted so you see the real, spendable value.
Tools
Pension Tax Relief Calculator UK: Basic, Higher and Additional Rate
A UK pension tax relief calculator that shows the real cost of a SIPP or pension contribution after 20% relief at source plus any higher or additional rate relief you claim back through Self Assessment.
Tools
How Long to Reach Your Investment Target: ISA and SIPP Time Calculator
Work out how long to reach 100k or any investment target, from your starting pot, monthly contribution and expected return, with the monthly amount that would get you there faster.