50/30/20 Budget Calculator
Halve take-home pay, then take 30% and 20%. On 3,500,000 that is 1,750,000 for needs, 1,050,000 for wants and 700,000 to save. Spending 2,100,000 on needs and 900,000 on wants leaves 500,000 — 200,000 short of the 700,000 share. Wants are 150,000 under their cap, so the shortfall comes from needs running 350,000 over: finding which bucket leaks is the point of the exercise. The three shares come from Elizabeth Warren and Amelia Warren Tyagi's All Your Worth (2005).
Your numbers
Actually left over
500,000
Needs at 50%
1,750,000
Wants at 30%
1,050,000
Saving at 20%
700,000
What it means
What is left is 14.3% of take-home pay, 200000 short of the 20% share of 700000. The needs cap is 1750000, the wants cap 1050000.
Formula
Needs at 50% = Net amount × 0.5, Wants at 30% = Net amount × 0.3, Saving at 20% = Net amount × 0.2
Divide after-tax income — use gross and all three caps come out too generous. What counts as a need is not settled: filing a phone plan, a car or insurance differently changes the answer, and in the original split debt interest and minimum payments are needs while principal paid above the minimum counts as saving. In a city where rent alone takes 40% of pay, 50% for needs cannot fit, so read the three shares as a gauge of what is squeezed rather than as a target.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Net amountWhat lands in your account after tax. | 3,500,000 | 0 and up |
| Needs spendingRent, food and other unavoidable spending; debt interest and minimums belong here. | 2,100,000 | 0 and up |
| Wants spendingSpending you could live without — dining out, travel, subscriptions. | 900,000 | 0 and up |
Step by step
Quick reference table
Results when only Net amount changes and everything else stays put.
| Net amount | Actually left over | Needs at 50% | Wants at 30% |
|---|---|---|---|
| 1,750,000 | -1,250,000 | 875,000 | 525,000 |
| 2,625,000 | -375,000 | 1,312,500 | 787,500 |
| 3,500,000 | 500,000 | 1,750,000 | 1,050,000 |
| 5,250,000 | 2,250,000 | 2,625,000 | 1,575,000 |
| 7,000,000 | 4,000,000 | 3,500,000 | 2,100,000 |
What each result means
| Result | At default values |
|---|---|
| Actually left overWhat is actually left after both buckets — the figure to hold against the 20%. | 500,000 |
| Needs at 50%Half of take-home pay; needs above this line squeeze the saving share. | 1,750,000 |
| Wants at 30%30% of take-home pay — the ceiling for discretionary spending. | 1,050,000 |
| Saving at 20%20% of take-home pay; principal paid above the minimum counts here too. | 700,000 |
Common mistakes
Divide after-tax income — use gross and all three caps come out too generous. What counts as a need is not settled: filing a phone plan, a car or insurance differently changes the answer, and in the original split debt interest and minimum payments are needs while principal paid above the minimum counts as saving. In a city where rent alone takes 40% of pay, 50% for needs cannot fit, so read the three shares as a gauge of what is squeezed rather than as a target.
Glossary
- Net amount
- What lands in your account after tax.
- Needs spending
- Rent, food and other unavoidable spending; debt interest and minimums belong here.
- Wants spending
- Spending you could live without — dining out, travel, subscriptions.
- Actually left over
- What is actually left after both buckets — the figure to hold against the 20%.
- Needs at 50%
- Half of take-home pay; needs above this line squeeze the saving share.
- Wants at 30%
- 30% of take-home pay — the ceiling for discretionary spending.
- Saving at 20%
- 20% of take-home pay; principal paid above the minimum counts here too.
Frequently asked questions
Q. How is 50/30/20 Budget Calculator calculated?
Needs at 50% = Net amount × 0.5, Wants at 30% = Net amount × 0.3, Saving at 20% = Net amount × 0.2 — Halve take-home pay, then take 30% and 20%. On 3,500,000 that is 1,750,000 for needs, 1,050,000 for wants and 700,000 to save. Spending 2,100,000 on needs and 900,000 on wants leaves 500,000 — 200,000 short of the 700,000 share. Wants are 150,000 under their cap, so the shortfall comes from needs running 350,000 over: finding which bucket leaks is the point of the exercise. The three shares come from Elizabeth Warren and Amelia Warren Tyagi's All Your Worth (2005).
Q. Can you walk through an example?
With Net amount 3,500,000, Needs spending 2,100,000, Wants spending 900,000, the answer is Actually left over 500,000.
Q. What do I need to enter?
Enter Net amount, Needs spending, Wants spending. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Net amount moves the answer to Net amount 1,750,000 → Actually left over -1,250,000 and Net amount 7,000,000 → Actually left over 4,000,000. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
Divide after-tax income — use gross and all three caps come out too generous. What counts as a need is not settled: filing a phone plan, a car or insurance differently changes the answer, and in the original split debt interest and minimum payments are needs while principal paid above the minimum counts as saving. In a city where rent alone takes 40% of pay, 50% for needs cannot fit, so read the three shares as a gauge of what is squeezed rather than as a target.
Related calculators
Tax rates and interest conventions differ by country and product — check your contract for real transactions.