50/30/20 Budget Calculator: Split Your Take-Home Pay (Free)

This calculator runs entirely in your browser: nothing you type is uploaded, stored or sent anywhere, and it keeps working with the connection off. Enter one number, your monthly take-home pay, and it splits that number into needs, wants and savings using the 50/30/20 rule. It also shows what those buckets mean per week and per year, lists the lines that usually belong in each one, and lets you move the percentages when the standard split does not match your rent.

How to use it

1. Find your take-home pay: the amount that actually arrives in your account each month, after tax and payroll deductions. Paid every two weeks? Multiply one paycheck by 26 and divide by 12, which gives a true monthly average instead of a two-paycheck month. If your income varies, use a cautious figure such as your lowest month in the last year, and treat anything above it as a bonus for the savings bucket.
2. Type that figure into the first field. The currency symbol defaults to a dollar sign, so change it to whatever you budget in. It only changes how the results are printed. Nothing is converted.
3. Needs and wants come back with a monthly figure and a weekly one underneath, because a weekly number is easier to feel while you are living it. Savings shows the monthly figure and what it adds up to over a year, since a year is the horizon where saving starts to look like anything.
4. Under the results sits a table of common spending lines and the bucket each belongs to. Housing, groceries, the commute and minimum debt payments under needs; restaurants, subscriptions, hobbies and upgrades under wants. Sort your own last month against it before you trust the split.
5. The three percentage fields start at 50, 30 and 20. If your needs already take more than half, change them to what is true and let the tool recalculate. The line under the fields tells you when the shares stop adding up to 100, and a reset button puts the standard split back.

What the split means here

The 50/30/20 rule comes from All Your Worth, a 2005 book by Elizabeth Warren and Amelia Warren Tyagi. Their argument was that most budgets fail because they ask people to track dozens of categories, and that three big buckets are enough to tell whether a financial life is in balance. The buckets are defined by what happens if you stop paying, not by how the spending feels.

The first half of your pay covers the payments with consequences: rent or mortgage, utilities, groceries, the transport that gets you to work, insurance, a basic phone plan, childcare, and the minimum payment on every debt. Miss one of those for two months and something breaks, whether a lease, a credit score or a commute. The book calls them must-haves and treats their share of income as the single most important number in a budget, because it decides how much room everything else gets.

Thirty percent goes to whatever you could pause for a month without real harm. Eating out and delivery, streaming and the rest of the subscriptions, hobbies, gifts, travel, clothes beyond replacement, the nicer version of a thing you already own. The rule is generous here on purpose. A budget with no room for wants lasts about six weeks.

The last fifth covers an emergency fund, retirement contributions, a deposit you are building toward, and any payment on a debt above its minimum. Extra debt payments sit here rather than under needs because they are a choice that improves your position, exactly as saving does. That is also why the calculator shows the savings figure per year as well as per month. The monthly number is a habit. The yearly number is a result.

The calculator does three multiplications and nothing cleverer. Needs are take-home pay times the needs percentage, wants are pay times the wants percentage, savings are pay times the savings percentage. The weekly figures divide by 4.33, the average number of weeks in a month, and the yearly savings figure multiplies by 12. That simplicity is the point. A rule you can work out in your head is a rule you will actually check against a bank balance.

Two things it will not do, both deliberately. It does not ask for gross pay and estimate your tax, because tax depends on a country, a filing status and half a dozen things a budget page has no business guessing at; take-home pay is the number on your bank statement and you already have it. And it does not save the split. Every visit starts at 50, 30 and 20, which annoys people who come back weekly and is the price of a page that stores nothing about you anywhere.

Where the split bends, and where it breaks

The 50/30/20 split is a shape, and shapes do not fit everyone.

Rent is where it fails first. In a lot of cities housing takes 35 to 45 percent of take-home pay for a single earner, leaving five to fifteen points for every other need, so the needs bucket is already overspent before groceries. This is far and away the most common reason someone opens this calculator and then closes it. Change the split to what is actually true, perhaps 65/20/15, and treat the gap between that and 50/30/20 as a target for the next year or two rather than a failing for this month. The low-income guide works through the adjustments in order of how much each one moves the number.

The rule fails at the other end too, more quietly. Someone on a large salary can meet every need at 25 percent of pay. The standard split hands them 30 percent for wants and caps savings at 20, when their situation would carry 40 or more. Nothing in the rule forbids saving more. Its round numbers just make it easy not to. If your needs sit well under half, the better split is needs as they are, savings as high as you can hold, and wants as whatever is left.

Then the grey areas, which are less dramatic and cause more trouble. A car is a need for the commute and a want in its trim level. Groceries are a need and the delivery fee on them is not. A phone plan is a need; the newest phone on a two-year contract is mostly not. The rule does not settle any of these for you, and a budget that files every borderline expense under needs ends up reporting a needs bucket that looks unavoidable when a third of it is a choice. The needs-versus-wants guide takes the borderline cases one at a time.

Large debt distorts things in a different way. The minimums sit under needs and everything above them under savings, which is correct, and which can leave the savings bucket looking healthy while nothing is actually being saved. Write down inside the 20 percent how much is debt payoff and how much is cushion, so the cushion does not quietly round to zero.

Last, and this is a warning rather than an exception: the split is a diagnostic, not a scorecard. Needs at 62 percent is something to know and plan around, not a test you failed. Budget guidance from public bodies, the CFPB's own worksheet included, starts in the same place. Write down what is true first.

Three pay packets, three splits

Sometimes the rule just fits. Take-home pay of $3,600 a month gives $1,800 for needs, $1,080 for wants and $720 for savings. Real needs: rent $1,150, utilities and phone $180, groceries $380, transit pass $90, a minimum card payment of $60. That is $1,860, three percent over. Close enough to hold the standard split and trim $60 from somewhere, probably groceries. Wants at $1,080 a month works out at roughly $250 a week, which is comfortable, and the savings line comes to $8,640 over a year.

Rent breaks it more often. On take-home pay of $2,400 the standard split allows $1,200 for needs, but rent alone is $1,050 and groceries, utilities, phone and transport add another $520, so real needs are $1,570, or 65 percent. Type 65, 20 and 15 into the split fields and you get $1,560, $480 and $360, within $10 of what is actually being spent. That is a budget this person can keep. It is not 50/30/20, and writing it down is what makes the real problem visible: about $370 a month of fixed cost, which is either a cheaper place at the next lease or a raise.

At the top end the numbers go the other way. Take-home pay of $8,000 against needs of $2,600, which is 32 percent. The standard split would hand over $2,400 for wants and stop savings at $1,600. Set the fields to 33/27/40 and you get $2,640, $2,160 and $3,200, which is $38,400 a year put away. The wants bucket is still generous. The savings bucket is finally doing the work the income allows.

Turning the wants figure into a cap

A split on a page is a plan. What decides whether it survives is whether you can see, on an ordinary Tuesday, how much of the wants bucket is left. That is what Cash Book is for.

The calculator gives you a wants figure. In Cash Book that figure becomes a monthly allowance in Budgets, which shows under the big number on Home as an amount left, and turns red only when you are over. For the lines that keep escaping, groceries, eating out, whatever your gray area is, a per-tag budget with its own progress bar holds a smaller cap inside the bucket. The buckets are yours to define with tags and categories: a Wants category holding restaurant, delivery and subscription tags will report the whole bucket in one place on the Expenses tab.

The reason this works where spreadsheets stall is logging speed. Saying "fourteen fifty lunch" into the voice logger takes three seconds, a receipt through the camera takes about the same, and an Apple Pay tap can log itself. When every purchase lands the moment it happens, the allowance on Home is true, and a true number changes decisions in a way a monthly review never does.

If you want the wider routine around the split, how to make a monthly budget that sticks covers the first month, the review and the common ways a budget drifts. How to stop impulse buying is about the wants bucket specifically and why seeing the amount left is most of the cure.

The other tools

The split gives you a monthly wants figure; the daily spending allowance calculator turns it into a number per day for the rest of the month, which is easier to hold in your head at a checkout. The savings goal calculator takes the 20 percent and tells you when a specific target arrives. The subscription cost calculator adds up the recurring lines that usually hide inside wants. The small purchases calculator shows what a daily habit costs per month and per year, and the hours of work calculator reprices any purchase in the time it took to earn it.

Where to go next

Start with the number the calculator gives for wants and set it as a monthly allowance. Let one full month run, log everything, and then look at the Expenses tab in Insights to see how the real split compares to the one on this page. If needs came in above 50 percent, the low-income guide is the next read. If wants came in well above 30, the impulse-buying guide is. If the split fit, the savings figure is the number to automate, and the savings goal calculator will tell you what it buys and when.

The rule is not a test you pass. It is a way of seeing three numbers instead of thirty, and of noticing which one has been quietly moving.

Get Cash Book on the App StoreFree for 7 days. $19.99 once for lifetime.

Get Cash Book on the App StoreFree for 7 days. $19.99 once for lifetime.