Source: https://budget44.com/tools/monthly-budget-calculator/ Budget44 is a free budget and expense tracker app for iOS and Android: transactions, accounts, monthly budgets, recurring bills and saving goals, stored on your phone. Get the Budget44 app: [App Store](https://apps.apple.com/app/id6766147588?pt=120576754&ct=budget44.md&mt=8) ยท [Google Play](https://play.google.com/store/apps/details?id=com.ehmtech.budget&referrer=utm_source%3Dbudget44.md) # Monthly Budget Calculator Enter your take-home pay and every bill to see your true monthly surplus, each category as a share of income, and your 50/30/20 split. _Interactive tool: open [the web page](https://budget44.com/tools/monthly-budget-calculator/) to use it. This Markdown copy has the text only._ Surplus is income minus fixed bills, minus variable spending, minus savings and debt payoff. Savings is a planned allocation here, not the leftover. Fixed versus variable is not the same split as needs versus wants. Minimum debt payments sit in needs and anything paid above the minimum sits in the savings bucket. Other fixed bills count as a need, other variable spending counts as a want. Three months of essential expenses is the low end of the usual emergency-fund guideline, so treat it as a starting target rather than a finish line. The widely quoted 30% and 28/36 rules are measured against gross pay, so they are not directly comparable to the 25% take-home figure used here. Savings and debt payoff sits outside the spending total, so those rows have no share-of-spending figure. ## How to build a monthly budget in four passes Most people stall on a budget because they try to remember everything at once. Four passes in a fixed order works better, and it is the order the fields above are in. Pass one is income, and it is take-home only. Whatever your offer letter says, budget the number that lands in the account. If two of you run one pot, add the second take-home figure. Benefits, child support and a typical side-hustle month go in the third line. If your income moves around, set a safe baseline first with the [irregular income budget calculator](https://budget44.com/tools/irregular-income-budget-calculator/) and bring that figure back here. Pass two is the bills that arrive whether you engage with them or not: rent or the mortgage, utilities, insurance, phone and internet, minimum debt payments, childcare, subscriptions. Annual costs belong here too, as a twelfth. Car registration, the yearly insurance premium and school fees all wreck a month that did not plan for them, so divide by twelve and enter the slice. Pass three is the spending that moves: groceries, fuel, eating out, shopping, fun, medical costs you pay out of pocket. Use a typical month rather than a good one. A budget built on your best month fails in every other month by design. Pass four is what you set aside on purpose. Savings goals, retirement, and any debt payoff above the minimums. This is the pass that separates a budget from a receipt. It is also why surplus on this page is defined as income minus all three spending groups: savings is a decision you made, not the money that happened to survive the month. ## What the percentages actually mean The 50/30/20 rule splits after-tax income into 50% for needs, 30% for wants, and 20% for savings and debt payoff. Elizabeth Warren and Amelia Warren Tyagi popularized it in _All Your Worth_ in 2005. Because it is defined on after-tax income, it lines up exactly with the take-home basis this calculator uses, which is not true of every percentage rule you will meet. Needs versus wants is not the same divide as fixed versus variable. Groceries are variable but a need. Subscriptions are fixed but a want. Minimum debt payments are a need because missing one has consequences, while anything paid above the minimum belongs in the 20% bucket alongside savings. The bucket card above states these calls so no number on the page is a mystery. If your rent alone eats half the paycheck, 50% for needs is not a target, it is a wish. The 60/30/10 chip is there for that case: 60% needs, 30% wants, 10% savings. It is a looser shape for high fixed-cost areas, and a smaller savings bucket you actually hit beats a bigger one you do not. On housing, this page compares rent or mortgage against 25% of take-home pay. The 30% figure everyone quotes, and the 28/36 rule with it, get measured against gross pay. Different denominator, different scale, so you cannot line either one up against the take-home number here. For context, the 2024 Consumer Expenditure Survey puts housing at about 33.4% of the average US household's total spending, transport at 17.0% and food at 12.9%. Those are shares of spending rather than of income, but they make the point: three categories decide the outcome, and the rest is rounding. Savings rate is the one number worth watching month to month. It is your savings and debt payoff divided by take-home pay, the household version of the national personal saving rate the Bureau of Economic Analysis publishes. That national figure has run in the low to mid single digits in recent years, while personal targets usually start at 10%, so double figures already put you ahead of the average household. ## When the number comes out negative A negative surplus is information, not a verdict. Work it in order of size rather than in order of guilt. The triage list ranks your discretionary categories and shows the share of the gap each one closes on its own, so you can see at a glance whether the fix is one line or five. The trim factor is the fastest read. If cutting every discretionary category by 15% closes the gap, that is a month's work and a bit of attention. If it needs 90%, the gap is structural and no amount of skipped coffee reaches it: the answer lives in housing, transport or income. Subscriptions are usually the least painful place to start, and the [subscription cost calculator](https://budget44.com/tools/subscription-cost-calculator/) will rank them for you. Watch for the debt-funded case, where the page shows a shortfall while money is still going out to savings and debt payoff. That is borrowing with extra steps, either on a card or by quietly draining the account you just funded. The calculator flags it rather than hiding it, because the honest version of the month is the only one you can act on. If you are paid every two weeks, the monthly shape here is only half the picture: the [biweekly paycheck budget calculator](https://budget44.com/tools/biweekly-paycheck-budget-calculator/) maps each bill to the paycheck that covers it. ## Turning a one-off calculation into a month that behaves A calculator gives you the plan. The month gives you the variance, and the variance is where budgets die. The usual failure point is week three, when the plan is still technically correct and the groceries envelope is already empty. Our note on [projected against actual spending](https://budget44.com/blog/budget-calendar-projected-vs-actual-spending/) covers why watching the gap fill matters more than setting the number. That is the part an app carries. Budget44 takes the same categories you just filled in and gives each one a cap you can watch fill through the month, with recurring monthly budgets so you set it once. Recurring income and bills run on six cadences, so the annual insurance slice stops being a memory exercise and shows up on the calendar before the money leaves. The calendar itself separates what you have recorded from what is still projected, and the accounts view tracks net worth for the debt-payoff side of that 20% bucket. Everything stays on the device. No account, no cloud sync, and no bank login handed to anyone, with amounts held as integer minor units so the totals stay exact to the cent, which is the same arithmetic this page runs on. [Download Budget44](https://budget44.com/#download) and give the plan a month to prove itself. ## Frequently Asked Questions Common questions about monthly budget calculator ### How do I calculate my monthly budget? Add up the money that actually lands in your account in a month, then list what leaves it in three groups: bills that arrive every month, spending that moves around, and money you set aside on purpose. Subtract the second and third from the first. What is left is your surplus. If it is negative, the plan is bigger than the paycheck and something has to move. ### What is the 50/30/20 rule? It splits your after-tax income into 50% for needs, 30% for wants, and 20% for savings and debt payoff. Elizabeth Warren and Amelia Warren Tyagi put it in front of a wide audience with their 2005 book _All Your Worth_. Needs are the things with consequences attached: housing, utilities, groceries, transport to work, insurance and minimum debt payments. It is a shape to aim at, and this calculator shows how far your real numbers sit from it. ### Should I budget on gross pay or take-home pay? Take-home pay. Gross pay includes money you never get to spend, so budgeting on it overstates every category and guarantees the plan does not fit. This calculator is take-home only from top to bottom. That is also why it uses the 25% of take-home housing guideline rather than the 30% rule, which is measured against gross pay. ### What percentage of my income should go to rent? A common guideline is 25% or less of take-home pay, covering rent or the mortgage plus the insurance and taxes bundled with it. The better-known 30% figure comes from the federal cost-burden definition in use since 1981 and is measured against gross pay, so the two numbers are not interchangeable. Housing is the biggest line in the average US household budget, about a third of total spending in the 2024 Consumer Expenditure Survey, so a few points either way changes the whole month. ### What is a good savings rate? Ten percent of take-home pay is the usual starting target, and 20% is what the 50/30/20 rule builds toward. Worth knowing where the bar actually sits: the Bureau of Economic Analysis has the national personal saving rate down in the low to mid single digits across recent years. Double figures already puts you well clear of the average household. ### What do I do when my expenses are more than my income? Go after the biggest lines first. Guilt is a bad sorting key. This calculator ranks your discretionary categories and shows the share of the gap each one closes on its own, so you can see whether trimming eating out is enough or whether the fixed bills have to move. If zeroing every discretionary line still leaves a gap, the answer is a fixed cost or income, not willpower. The [subscription cost calculator](https://budget44.com/tools/subscription-cost-calculator/) is a good first pass at the recurring end of that list. ### What is the difference between fixed and variable expenses? A fixed expense is the same amount on the same date, like rent, insurance or a loan payment. A variable expense moves with your choices and the season, like groceries, fuel and eating out. The split matters because variable spending is where a budget can actually be adjusted this month. Note that fixed versus variable is not the same divide as needs versus wants: groceries are variable but a need, and subscriptions are fixed but a want. ### Should annual bills go in a monthly budget? Yes, as a twelfth. Car registration, annual insurance, holidays and school fees will blow a hole in any month that has not saved for them. Divide the yearly figure by twelve, enter the monthly slice, then hold that money aside until the bill lands. Budget44 handles the same idea with recurring transactions on a yearly cadence, so the projection appears on the calendar before the money leaves. ## Related Tools - [50/30/20 Budget Calculator](https://budget44.com/tools/50-30-20-budget-calculator/): Split your monthly take-home pay into needs, wants and savings, compare the targets against what you actually spend, and try 70/20/10 or a custom split. - [Bill Split Calculator](https://budget44.com/tools/bill-split-calculator/): Split rent, utilities and shared bills between roommates or partners: equally, by income share, or by custom percentages, down to the exact cent. - [Budget vs Actual Calculator](https://budget44.com/tools/budget-vs-actual-variance-calculator/): Compare what you budgeted with what you actually spent, category by category. See the variance in dollars and percent, and your three worst overspends. - [Commuting Cost Calculator](https://budget44.com/tools/commuting-cost-calculator/): Work out what your commute costs per day, month and year by car or transit, what one more remote day would save, and how many hours a year it takes.