The 60% solution: one number instead of forty categories

In the early 2000s, Richard Jenkins — then editor-in-chief of MSN Money — admitted something unusual for a personal finance editor: he'd never been able to stick with a category budget. His fix became the 60% Solution, and it's aged remarkably well. The entire method is one constraint: all of your committed expenses must fit inside 60% of your gross income. Everything else is a formula.

How the split works

Committed expenses means everything you've promised to someone: taxes withheld from your paycheck, rent or mortgage, utilities, insurance, groceries, minimum debt payments, phone, subscriptions. Note the unusual part — this is 60% of gross, and taxes count inside it. The remaining 40% splits into four fixed buckets of 10% each.

• 10% retirement: 401(k), IRA — ideally straight out of payroll so you never see it.
• 10% long-term savings: extra debt payoff early on, then a growing emergency fund and big future goals.
• 10% short-term savings: the irregular stuff — car repairs, gifts, annual premiums, travel. Jenkins' version of sinking funds, pooled into one bucket.
• 10% fun money: spent on anything, tracked by no one, defended without apology.

Finding your own ratio in ten minutes

The diagnostic is worth running even if you never adopt the method. Take one month's gross pay from a pay stub. Add up everything committed: the taxes withheld on that stub, housing, utilities, insurance, groceries, minimum debt payments, phone, subscriptions, childcare — anything that bills you whether or not you cooperate. Divide by gross. Under 55% and you have genuine slack; the four buckets will fit with room to spare. Between 60% and 70%, the method still functions with the buckets trimmed to 7-8% each, but the number is telling you which direction the next big decision should lean. Over 70%, stop optimizing categories entirely — the ratio has already diagnosed the problem, and it's a big rock: housing, transportation, debt load, or income. Most people have never computed this number, and most people's financial anxiety lives exactly inside it.

Why one number beats forty

Category budgets ask you to make hundreds of small classification decisions a month. The 60% Solution asks you to check exactly one ratio, occasionally. If committed expenses are at or under 60% of gross, the formula guarantees a 20% savings rate plus a funded buffer for lumpy expenses — automatically, forever. If they're over 60%, you don't have a tracking problem, you have a structural one, and no spreadsheet granularity will fix it.

The four 10% buckets also encode a priority order worth noticing. Retirement comes first because it's the least recoverable — missed compounding years can't be bought back. Long-term savings doubles as the debt-payoff lane early on, because a 24% credit card outranks any savings account. The short-term bucket exists so that lumpy expenses stop mugging the other three. And fun money is load-bearing, not decorative: Jenkins understood that a plan with zero sanctioned pleasure gets abandoned, and an abandoned plan saves nothing. Cut any bucket in a crisis — but cut fun money last, not first.

Who it fits

• Steady W-2 earners whose withholding is predictable — the gross-income math depends on it.
• People who've abandoned detailed budgets repeatedly and want one rule they'll actually keep.
• Solid savers who want a sanity-check ratio more than a plan — checking the 60% line twice a year is the whole maintenance schedule.

Who it breaks for

The method has real failure modes. In high-cost cities, housing plus taxes alone can blow past 60% of gross on a perfectly reasonable income — the rule then just delivers a monthly verdict of 'move,' which isn't always actionable. High earners in high-tax states get squeezed the same way, because withholding eats a third of the committed bucket before rent shows up. And irregular earners can't anchor to gross monthly income at all; they need a baseline-income system first.

If you're over the line, Jenkins' own advice was blunt: attack the big commitments, not the small pleasures. Refinance, move, drop to one car, kill the payment plans. Getting committed costs from 70% to 60% of gross frees more money than a decade of coupon discipline.

The bottom line

The 60% Solution compresses budgeting into a single ratio: committed expenses inside 60% of gross, four automatic 10% buckets for the rest. It's a poor fit for very high-cost cities and irregular incomes, but for a steady earner who hates tracking, it delivers what forty categories promise and rarely achieve — a guaranteed savings rate and a clear signal about what actually needs to change. Twenty years after Jenkins wrote it, the method survives for the same reason it worked then: it asks one question, and it's the right question.