Budget Planner — 50/30/20 and Custom Splits
Allocate income across categories using 50/30/20 or a split of your own, with any shortfall shown explicitly.
Budget Planner — 50/30/20 Rule
Needs — 50%
Rent, utilities, groceries, insurance, transport
$2,150
target $2,500
$350 under budget
Wants — 30%
Dining, entertainment, subscriptions, shopping
$500
target $1,500
$1,000 under budget
Savings & Debt — 20%
Emergency fund, investments, loan payoff
$1,000
target $1,000
Summary
Needs (50%) $2,150 / $2,500
Wants (30%) $500 / $1,500
Savings (20%) $1,000 / $1,000
Total allocated $3,650
Unallocated +$1,350
Budgeting methods that work for different people
| Method | How it works | Suits |
|---|---|---|
| 50/30/20 | 50% needs, 30% wants, 20% savings and debt repayment — of take-home pay | Most people starting out. Simple enough to stick to |
| Zero-based | Every unit of income is assigned a job until the balance is zero | People who want maximum control and will do the monthly work |
| Pay yourself first | Automate savings on payday; spend the rest freely | People who hate tracking. Very effective, very low effort |
| Envelope | Fixed allocation per category; when it is gone, it is gone | Overspending in specific categories |
| 80/20 | Save 20%, do not track the rest at all | High earners with adequate margin |
The best method is the one you will still be using in six months. Elaborate systems have a high abandonment rate; "pay yourself first" survives because it requires nothing ongoing.
Where budgets usually fail
- Forgetting irregular expenses —Insurance, car maintenance, holidays, gifts. They are not unexpected — they are annual. Divide the yearly total by twelve and treat it as a monthly cost.
- Budgeting gross instead of net —Use take-home pay. Tax and pension contributions are not available to allocate.
- Categories too granular —Fifteen categories is a chore nobody sustains. Five to eight is enough to change behaviour.
- No allowance for anything unplanned —A budget with zero slack breaks on the first surprise, and the break tends to be permanent.
- Treating subscriptions as fixed —They accumulate silently. Audit them once a year — most people find several they had forgotten.
- Confusing needs with wants —The 50/30/20 split only works if the classification is honest. Housing and food are needs; the size of the house and where the food comes from are partly wants.
About
The Budget Planner applies the popular 50/30/20 budgeting rule to your monthly take-home income. It instantly shows you how much to allocate to needs (50% — rent, utilities, groceries, insurance), wants (30% — dining, entertainment, subscriptions, hobbies), and savings/debt repayment (20% — emergency fund, investments, loan payoff). Enter your actual spending in each category to compare against the target and see which buckets are over or under budget. All calculations run locally in your browser.
How to use
- 1 Enter your monthly take-home (after-tax) income.
- 2 The tool shows the 50/30/20 target amounts for needs, wants, and savings.
- 3 Enter your actual spending in each category to see your budget variance.
- 4 Green means under budget; red means over budget.
- 5 Adjust your spending to bring each category within target.
- What is the 50/30/20 budgeting rule?
- The 50/30/20 rule, popularised by Senator Elizabeth Warren in her book "All Your Worth", divides your after-tax income into three buckets: 50% for needs (rent, utilities, groceries, minimum debt payments, insurance), 30% for wants (dining out, entertainment, subscriptions, hobbies), and 20% for savings and debt payoff (emergency fund, investments, extra loan payments). It is a simple framework to balance present enjoyment with future security.
- What is the difference between needs and wants in the 50/30/20 rule?
- Needs are expenses required for basic survival and financial obligations — rent or mortgage, utilities, groceries, transportation to work, minimum debt payments, and health insurance. Wants are optional spending that improves quality of life but is not essential — restaurants, streaming services, gym memberships, vacations, and new clothes beyond the basics. The line can be blurry — a car may be a need for commuting but a luxury model is partly a want.
- What if I cannot save 20% of my income?
- The 50/30/20 rule is a guideline, not a strict rule. If you live in a high cost-of-living city, needs may consume 60–70% of income, leaving less for savings. In that case, prioritise any amount of savings over none — even 5–10% builds the habit and grows over time. Alternatively, look for ways to reduce wants (the 30% bucket) to free up more for savings.
The full guide
More in FinTech Tools
Currency Converter Convert between world currencies at current reference rates, with a conversion table for common amounts.Exchange Rate Tracker Track a currency pair over time to see the trend behind today’s rate.Crypto Price Tracker Current prices for major cryptocurrencies against fiat, with change over common intervals.Crypto Unit Converter Convert between bitcoin and satoshis, ether, gwei and wei — where an order-of-magnitude slip is expensive.Loan EMI Calculator Monthly instalment, total interest and a full amortisation schedule for any principal, rate and term.Mortgage Calculator Repayments including taxes and insurance, with the effect of overpayments on term and total interest.
See all fintech tools.