See your 50/30/20 split live — and the category that's quietly eating your savings rate.
A clean budgeting planner: take-home income, every category line, and instant comparison to the 50/30/20 rule of thumb. Find the leak in 30 seconds.
Direct answers to the most common questions, in plain language. Skim if you're in a hurry; dig deeper below.
50% needs, 30% wants, 20% savings/debt paydown.
A simple budgeting framework: 50% of after-tax income to needs (housing, food, transport, utilities, insurance), 30% to wants (dining, entertainment, travel), 20% to savings and debt payoff above minimums.
Net (take-home).
Budget against take-home pay so the math is real. The 50/30/20 percentages assume after-tax income. Pre-tax categories like 401(k) contributions are separate.
In the 20% savings bucket, or outside it.
401(k) contributions are pre-tax, so they're subtracted before you see take-home — they don't need to fit in the 20% bucket. Roth IRA and post-tax brokerage do count toward the 20%.
Budget against the floor, not the average.
For variable income (freelance, commission), budget against the lowest reliable monthly amount. Treat upside months as bonus savings. The alternative (budgeting against average) eats the buffer the moment a slow month hits.
The mechanics in short answers — no jargon, no upsell.
After tax, after 401(k), after health insurance — what actually lands in your bank account.
Needs (rent, food, transport), wants (dining, entertainment), savings (Roth, brokerage, emergency fund). Every dollar gets a job.
You'll see your actual percentages. Adjust if a category is dramatically off — or set your own target if 50/30/20 doesn't fit your life.
Usually 1–2 categories are 30%+ over what you assumed. That's where the work is — not on the 5% lines.
Designed so anyone can model their situation in under a minute, with or without a finance background.
Your actual percentages compared to the rule of thumb.
See which category is eating more than its share.
Add lines for childcare, subscriptions, pets — whatever's real.
The percentage of your income that becomes wealth.
A clean breakdown that makes the leak obvious.
Shareable URL captures your numbers so you can compare next month.
Everything you might ask before, during, or after using this tool.
Often no — housing alone can be 35–40% of take-home in major metros. A modified split (60/20/20 or 65/15/20) is more honest. The point of the framework isn't the exact numbers; it's having a target and noticing when you drift.
Needs: the version of the line you'd still have in a layoff — basic groceries, the cheapest apartment that works, transportation to a job, insurance. Wants: anything above that bar — restaurant meals, brand premiums, subscriptions, leisure travel. The honest test: would you keep paying for this if your income dropped 30%?
Budget the purchase itself, in the category it belongs to. The credit-card payment is just settlement. If you ate $400 of takeout last month, $400 goes in the food/wants line — not "credit card."
Get specific about why. If housing is the killer, that's the move (smaller apartment, roommate, different city). If it's small leaks (subscriptions, dining), add them up — they're often $500–800 of "invisible" spending.
Use sinking funds. Estimate annual cost ÷ 12, transfer to a savings sub-account monthly. When the expense hits, you have the money ready. Treat car repair, holidays, and annual insurance the same way.
Different tools, different philosophies. Zero-based (YNAB, EveryDollar) is more precise but more work. 50/30/20 is the on-ramp — most people don't need precision, they need awareness. Start with 50/30/20; upgrade if you want.
Quick monthly check-in (15 min): pull last month's totals from your bank/credit card, drop them in, compare to target. Don't track every transaction — that's the path to burnout. Pull category totals once a month.
Per month — it's the unit most expenses run on (rent, subscriptions, utilities). Some people do paycheck-by-paycheck for cashflow management on top of the monthly plan, but the strategic budget lives at month level.
Other Lazysmirk tools that pair well with this one.
Size your emergency fund to your real expenses and risk profile, then see exactly how many months until you hit the target.
Solve for the monthly contribution that hits any savings goal — house down, wedding, sabbatical, anything.
Calculate your front-end and back-end DTI, see which loan programs you qualify for, and stress-test new debt before you apply.
Calculate your real take-home pay after federal, state, and FICA taxes. Includes 401(k), HSA, health insurance, and other pre-tax deductions.
Project your Financial Independence number and the year you can retire — based on your savings, spending, and returns.
The biggest leak in most budgets isn't coffee — it's the gap between what you think you spend and what you actually spend, usually in 1–2 categories that ballooned without you noticing.
A budget makes the leak visible. That's the whole point. The discipline isn't in tracking every dollar — it's in seeing the truth.
Half to needs, almost-a-third to wants, a fifth to savings + debt above minimums. Simple, durable, scaled.
In expensive cities, the percentages shift — but the framework still works. The discipline is being honest about which category each spend is in, then naming the one that's out of line.
Annual expenses (car insurance, holidays, car repair, vet bills) destroy monthly budgets when they hit.
Sinking fund: estimate annual cost, divide by 12, transfer to a sub-savings account every month. When the bill arrives, the money is there. No surprise, no credit card.
Income doesn't determine when you retire. Savings rate does. A 50% savings rate retires in 15–17 years regardless of how much you earn. A 10% savings rate retires in 50.
Everything else in a budget is in service of moving that one number up.
Two short notes worth reading before you trust any number on this page.
Your loan amount, rate, and prepayment inputs never leave your device. No accounts, no cookies on your numbers, no analytics on the values you type. Disconnect from the internet and it still works.
We are not a bank, NBFC, advisor, broker, or distributor of any financial product. The numbers shown here are estimates for educational purposes only, based on the inputs you provide.
Results are not financial, legal, or tax advice. Please consult a qualified professional before any decision about your loan, investments, or personal finances. Actual loan terms and charges depend on your bank and individual circumstances.
