50/30/20 Budget Splitter
Split your income 50% needs / 30% wants / 20% savings (or your own ratios). Monthly + annual breakdown + years-to-FIRE based on your saving rate.
50/30/20 Budget Calculator
Allocation ratios (auto-balance to 100%)
How to use the 50/30/20 Budget Calculator
Enter your after-tax income
Use net pay — what hits your bank account after tax, FICA, 401k, etc. For monthly cadence enter take-home pay per month. For annual, enter the full year's net.
Stick with 50/30/20 or adjust
The default is Elizabeth Warren's canonical split. Adjust the percentages if your situation calls for it — high cost-of-living areas often need 60% for needs; aggressive FIRE practitioners push savings to 40-50%. The three boxes auto-balance to 100%.
Categorise your spending honestly
Needs = if-you-stopped-paying-bad-things-happen: housing, food at home, transport, utilities, insurance, debt minimums. Wants = lifestyle: dining out, streaming, hobbies, vacations. Savings = future you: investments, 401k, retirement accounts, emergency fund, debt payoff beyond minimum.
Use the FIRE projection as a reality check
The bottom of the result shows years-to-FIRE based on your savings rate. If it says "30+ years," you're on the standard retirement track. Under 20 years means you're in FIRE territory. Under 10 means you're in lean-FIRE or super-aggressive savings mode.
50/30/20 — the budget rule that doesn't require a spreadsheet
Elizabeth Warren and her daughter Amelia Warren Tyagi set out the split in All Your Worth: The Ultimate Lifetime Money Plan (Free Press, 2005): divide after-tax income into 50% for needs, 30% for wants and 20% for savings and paying down debt. What made it popular is that it needs three totals, not a line-by-line budget. You check whether each bucket is inside its share, not what you spent on coffee.
What the three boxes do here
The calculator splits monthly or annual take-home pay by the three percentages and shows each share per month and per year. Change one box and the other two re-split the remainder in the ratio they already had, so the three always add up to exactly 100. Leave a box to finish typing first: the rebalance happens when you move on, not on every keystroke. The FIRE line beneath is a rough check, not a plan. It takes needs plus wants as your yearly spending, sets a target of 25 times that (a 4% withdrawal rate) and counts the years for your savings share to reach it from zero at a 7% real return.
The point of 50/30/20 isn't to perfectly hit the ratio. It's to give you a structure to compare against — and notice when housing creeps past 50%, or when wants quietly take 45%.
Singapore: CPF comes out before take-home pay
The split runs on after-tax income, and in Singapore that question has a second half. From 1 January 2026, CPF contributions for employees aged 55 and below earning over S$750 a month are 37% of wages: 20% from the employee and 17% from the employer. The employee's 20% is deducted before pay reaches your account, so if you enter take-home pay here, CPF is already outside the split. Your personal 20% is then saving on top of it. If you would rather count CPF as part of your savings, enter gross pay and treat the CPF share as already saved.
What the savings share does to the timeline
Because the FIRE target is 25 times what you spend, a higher savings rate shortens the timeline from both ends: more goes in each year, and the target is smaller. On this tool's assumptions (from zero, 7% real, 25 times spending), saving 20% of take-home pay takes 31 years, 30% takes 25, 40% takes 20 and 50% takes 15. Housing that pushes needs past 50% usually comes out of the savings share, and the timeline lengthens accordingly.
Warren and Tyagi's split, CPF's 37%, and the years each savings rate takes
The split comes from Elizabeth Warren and Amelia Warren Tyagi's All Your Worth (Free Press, 2005).
It runs on after-tax income: 50% needs, 30% wants, 20% savings and paying down debt.
The boxes here always sum to 100: the other two re-split the remainder in the ratio they already had.
From 1 Jan 2026, CPF for employees aged 55 and below is 37% of wages over $750 a month: 20% employee, 17% employer.
The employee's CPF share is deducted before take-home pay, so a take-home figure here already excludes it.
On this tool's FIRE assumptions, saving 20% of take-home pay takes 31 years from zero.
Saving 30% takes 25 years, 40% takes 20 and 50% takes 15: the target shrinks as the savings grow.
The FIRE target is 25 × yearly spending, which is what a 4% withdrawal rate implies.
The FIRE line assumes a steady 7% real return; a lower return lengthens every one of those timelines.
Paying debt down faster than the minimum counts toward the 20%.
Frequently Asked Questions
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It depends on which income you enter. The split runs on take-home pay, and money deducted before you are paid, such as a 401(k) deferral or the employee's 20% CPF contribution in Singapore, is already outside it. Then your 20% is saving on top. If you would rather count those deductions as part of your savings, enter gross pay instead and treat them as part of the 20%. Either works if you use it consistently.
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Need = if you don't pay it, bad things happen. Housing, basic food, utilities, transport to work, basic clothes, health insurance, debt minimums. Want = lifestyle. Dining out, streaming, hobbies, vacations, fancy clothes, premium phone plan, gym membership. The grey zone is real but the test "would my life literally not work without this?" cuts most ambiguous cases cleanly.
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Common in high-cost-of-living cities and for low-to-mid earners. Three options: (1) reduce housing/transport via roommates, longer commute, or moving; (2) reduce wants/savings ratios to compensate temporarily; (3) increase income via side hustle or career switch. The 50/30/20 rule is a target — sometimes the lesson it teaches is that your current situation isn't sustainable.
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50/30/20's whole appeal is NOT tracking every expense. Set up auto-transfers to move the 20% savings on payday. Pay needs from one account, leave wants in another, check bucket totals monthly. If you find yourself wanting to track in detail, switch to zero-based budgeting (YNAB, Monarch) — that's the more granular framework.
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Yes. Build emergency fund first (3-6 months of expenses in liquid cash), then redirect that 20% to long-term investments. Some practitioners split the 20% as 10% emergency + 10% retirement while building the emergency fund, then 0%/20% once it's full.
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Use a 3-month rolling average. On a good month, top up emergency fund + savings beyond 20% (lean into the surplus). On a slow month, dip into emergency fund rather than skipping savings. The framework is annual-target-focused; monthly variance is fine as long as the year averages out.
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If you want to stop work early, the savings share matters most. On this tool's assumptions (starting from zero, a 7% real return, a target of 25 times yearly spending), saving 20% of take-home pay takes about 31 years, 30% about 25, 40% about 20 and 50% about 15. The rule's 20% suits a conventional retirement timeline; a FIRE plan moves money from wants, and sometimes needs, into savings.
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Paying down debt faster than the minimum counts toward the 20% in this framework. A debt charging more than your savings can safely earn is usually worth clearing first, because every dollar repaid saves its full interest rate, after tax and with no risk. Keep some emergency cash while you do it, so a surprise bill does not go back on the card.
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Two schools of thought. Strict FIRE: no, your home isn't liquid wealth, so it doesn't count toward "savings." Pragmatic: yes, you're building equity even if illiquid. Most 50/30/20 practitioners put mortgage principal under "needs" (it's the housing payment) and exclude it from the 20% savings target. Treat any extra principal payments as savings.
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No. All calculation happens entirely in your browser via JavaScript. Open DevTools → Network and watch — there's zero outbound traffic.
Method & sources
How it computes
Monthly income x each share for needs, wants and savings; the other two shares re-split the remainder in their existing ratio so the three sum to exactly 100. FIRE line: target 25 x (needs + wants) a year, years for the savings share to reach it from zero at 7% real. RecaBusiness.rebalance / yearsToTarget, tested.
What this tool implements
- Rebalancing rounded both other shares and could total 99 or 101, and it ran on every keystroke, so typing 55 passed through 5 and dragged the ratio. It now gives the rounding remainder to one share and runs when the user finishes editing.
- Warren and Tyagi, All Your Worth (Free Press, 2005). CPF from 1 Jan 2026 for employees aged 55 and below earning over $750: 37% (17% employer, 20% employee); the page now explains the employee share is already outside take-home pay. Savings-rate timelines computed by the kernel: 20% 31 years, 30% 25, 40% 20, 50% 15.
- Removed as unsourced: Tyagi's current employer, US household savings-rate figures, EPF 11-23%, city rent shares and claims about how long high savers last.
Sources
- Warren E, Tyagi AW. All Your Worth: The Ultimate Lifetime Money Plan. Free Press; 2005. ISBN 9780743269872. https://openlibrary.org/works/OL3008892W
- Central Provident Fund Board. How much CPF contributions to pay (rates from 1 January 2026). https://www.cpf.gov.sg/employer/employer-obligations/how-much-cpf…
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