Budget Calculator

The 50/30/20 rule turns a vague 'I should spend less' into a concrete plan: half for needs, a third for wants, the rest for your future. Play with the allocator to see how every percent you give one category is taken from another — and how the leftover is the money that feeds the compounding curve.

Free and interactive — no sign-up, nothing to install. Read the full lesson for the plain-language explanation.