Generate a Savings Challenge for Irregular Freelance Income

Every savings challenge online assumes a fixed weekly amount, which is useless when this month's income and next month's are nothing alike. This builds a percentage based rule instead: a share of whatever comes in, moved automatically, with one milestone to aim for after three months.

You freelance or do gig work and your income varies month to month, so a standard savings challenge that asks for a fixed amount each week does not fit. Generate a savings challenge built around a percentage of whatever comes in, not a fixed pound amount: state the percentage to set aside from each payment received, a simple rule for which account it goes into straight away, and one milestone to hit after three months. Keep it to one paragraph plus a three line rule set, written for someone who has never stuck to a savings plan before.