What is the 50/30/20 rule?
It's a starter budget framework that splits after-tax income into 50% needs (housing, utilities, groceries, transportation, insurance, minimum debt payments), 30% wants (dining out, entertainment, subscriptions, hobbies), and 20% savings and extra debt payoff. It's popular because it's simple and flexible — in high cost-of-living areas, many people end up closer to 60/20/20.
Should I budget with gross or net income?
Use net (after-tax) income—that's what actually hits your bank account. If you have pre-tax deductions (401k, health insurance), you can include those as 'expenses' if you use gross income, but net is simpler and more intuitive.
What is a zero-based budget?
A zero-based budget assigns every dollar of income a specific job — needs, wants, savings, debt payoff — until income minus all assignments equals zero. It's more detailed than 50/30/20 and works well for people who want tight control, especially when paying down debt or saving for a specific goal.
How do I handle variable income?
Budget based on your lowest typical month. In higher-earning months, immediately move excess to savings. Some people use a 'holding' account—deposit all income there, then 'pay yourself' a consistent monthly salary.
How much should I save each month?
Aim for at least 15%–20% of take-home pay if you can. If that's not possible right now, start with anything above 0% and raise it 1 percentage point every few months. Even 5% is better than nothing — the habit matters more than the starting amount.
What if I can't balance my budget?
If expenses exceed income, you must either increase income or decrease expenses—there's no other option. Start by cutting discretionary spending (dining out, subscriptions). If that's not enough, look at bigger changes: housing, transportation, or finding additional income.
How much should I have in emergency savings?
Standard advice is 3-6 months of essential expenses. If you have unstable income or a single-income household, aim for 6-12 months. Start with a $1,000 mini-emergency fund, then build from there.
Should I pay off debt or save first?
Both. Save a small emergency fund ($1,000) first, then attack high-interest debt (over 7%). Once high-interest debt is gone, build full emergency fund while investing for retirement. Low-interest debt (under 5%) can wait.
How often should I update my budget?
Review spending weekly, adjust the budget monthly. Major life changes (new job, move, baby) require immediate budget overhauls. Annual reviews help adjust for lifestyle inflation and changing priorities.
Does the savings rate include money already in my Savings line?
No — the calculator's Savings Rate is calculated from your Monthly Balance (income minus all expenses, including the Savings line). If you've already entered $500 on the Savings line, that money is treated as spent into your savings goal, and the rate only reflects additional surplus on top. For total set-aside, add the Savings line to the surplus and divide by income.
Where should I put my 401(k) contributions?
If you're using take-home pay as income, your 401(k) is already deducted and shouldn't be added separately. If you're using gross income, list 401(k) contributions under Savings so they count toward your retirement set-aside. Same logic applies to HSA and pre-tax benefit contributions.
How is this different from the home page's other money calculators?
This calculator focuses on the monthly cash-flow picture: income vs. expenses across all categories. Other tools are narrower — the mortgage calculator handles loan payments only, the savings calculator projects growth over time, and the loan calculator handles repayment math. Use the budget calculator first to see your full picture, then drill into the specific tool you need.
