How to Make a Monthly Budget (Step-by-Step Guide)
By Presusimple
You got paid on Friday. By Wednesday, you're wondering where half of it went. Sound familiar?
A monthly budget is not a spreadsheet punishment—it's a plan that tells your money where to go before it disappears. To make a monthly budget: add up your take-home income, list every expense, assign dollar amounts to categories, track spending weekly, and review at month-end. That's it. The hard part is starting. This guide walks you through each step with real numbers you can copy.
What a monthly budget actually is
A monthly budget is a spending plan for one calendar month. You compare money coming in (income) against money going out (expenses and savings). The goal is not to restrict yourself into misery—it's to make intentional choices so you're not surprised on the 28th.
Think of it like a GPS for your wallet. You wouldn't drive across the country without directions. Why navigate an entire month of spending blind?
Step 1: Calculate your real monthly income
Start with what actually hits your bank account—not your gross salary.
Include:
- Net salary (after taxes and deductions)
- Freelance or side income (use a 3-month average if it varies)
- Regular transfers from a partner or family member
- Any predictable monthly income
Exclude (for now):
- Bonuses you can't count on
- Tax refunds (treat those as windfalls, not baseline income)
- One-time gifts
Example: María earns €2,800 gross but takes home €2,100 after taxes. She also averages €400/month from freelance design work. Her real monthly income is €2,500.
If your income changes every month, budget using your lowest typical month. Any extra becomes savings or debt payoff—not permission to overspend.
Step 2: List fixed vs variable expenses
Pull up your last two months of bank statements. Yes, all of them. Coffee runs included.
Fixed expenses (same amount every month)
- Rent or mortgage
- Utilities (average if they fluctuate)
- Insurance (divide annual premiums by 12)
- Loan and credit card minimum payments
- Subscriptions (streaming, gym, apps)
- Phone and internet
Variable expenses (change month to month)
- Groceries
- Dining out and delivery
- Transportation (gas, transit, rideshare)
- Clothing and personal care
- Entertainment
- Gifts and donations
- Household supplies
Pro tip: Don't forget irregular costs. Car maintenance, annual subscriptions, and holiday gifts will wreck a budget if you ignore them. Add a "sinking fund" category—€50/month for car stuff, €30/month for gifts—and you're covered when the bill arrives.
Step 3: Set category limits (start with 5–8)
You don't need 30 categories on day one. Start simple:
| Category | Monthly limit |
|---|---|
| Housing (rent + utilities) | €900 |
| Groceries | €350 |
| Transportation | €150 |
| Dining out | €120 |
| Savings | €300 |
| Fun money | €100 |
| Everything else | €580 |
That's €2,500 total—income minus planned spending equals zero. Every euro has a job.
Rules for setting limits:
- Cover needs first — housing, food, transport, minimum debt payments
- Pay yourself second — even €50/month to savings counts
- Be honest about wants — cutting dining out to zero rarely works long-term
- Leave buffer — a small "miscellaneous" category absorbs surprises
Want a deeper dive into assigning every euro a purpose? Read our guide on zero-based budgeting.
Step 4: Track weekly, adjust mid-month
A budget you set on the 1st and forget until the 30th is just a wish list.
The weekly check-in (15 minutes):
- Open your bank app or budgeting tool
- Compare actual spending vs your limits in each category
- Ask: "Am I on track, or do I need to shift money between categories?"
If you've spent 80% of your dining-out budget by the 15th, you have two choices: cook at home for two weeks, or move €40 from "fun money" into dining out. Both are fine—the point is that you decide consciously instead of swiping your card and hoping.
Logging expenses as they happen takes 10 seconds. Waiting until month-end means guessing, and guessing means quitting.
Step 5: Month-end review template
On the last day of the month (or first day of the next), answer these four questions:
- What categories did I overspend? Why? (One-off event or bad estimate?)
- What categories had money left over? Should I lower that limit next month?
- Did anything surprise me? Add it to next month's plan.
- What one change will I make next month? Pick just one—don't overhaul everything.
Write your answers down. A notes app works. So does the back of an envelope. The act of reviewing matters more than the tool.
Example review: "Overspent on groceries (€420 vs €350 budget) because I hosted dinner twice. Underspent on fun money. Next month: raise groceries to €380, keep fun money at €100, add €40 sinking fund for car insurance due in March."
Sample budget: €2,500/month take-home
Here's a complete budget for someone earning €2,500 net per month in a mid-size European city:
- Housing: €900 (rent + utilities)
- Groceries: €350
- Transportation: €150 (transit pass + occasional taxi)
- Dining out: €120
- Health & personal care: €80
- Subscriptions: €45 (phone, streaming, apps)
- Savings: €300 (emergency fund + goals)
- Fun money: €100 (no guilt spending)
- Sinking funds: €80 (car, gifts, annual costs)
- Miscellaneous: €375 (buffer for the unexpected)
Total: €2,500. Income minus planned spending = €0. You're not broke—you're planned.
Adjust the percentages for your life. Someone with lower rent might save more. Someone with kids needs a bigger grocery line. Your budget should fit your reality, not a template from the internet.
Common mistakes to avoid
- Budgeting gross income instead of net — you'll always feel short
- Forgetting annual expenses — divide by 12 and save monthly
- Too many categories — paralysis by spreadsheet
- Too few categories — "everything else" becomes a black hole
- No fun money — restrictive budgets die in week two
- Skipping the review — a budget without feedback never improves
- Giving up after one bad month — budgeting is a skill, not a talent
FAQ
How long does it take to make a monthly budget?
Your first budget takes 1–2 hours if you gather bank statements and list expenses. After that, monthly setup takes 15–30 minutes, and weekly check-ins take about 15 minutes. Most people feel confident by month three.
What if my income varies every month?
Budget using your lowest typical month. In higher-income months, send the extra to savings, debt, or next month's buffer. Freelancers and commission workers often keep a "holding" category for slow months.
What's the best day to start a monthly budget?
The 1st of the month is ideal, but any day works. Start today with whatever is left in the month—partial months still teach you habits. Don't wait for the "perfect" Monday.
Do I need a budgeting app?
Pen and paper work. Spreadsheets work. Apps work faster because they track categories, show charts, and remind you to log expenses. The best tool is the one you'll actually use every week.
Start your budget today
You don't need to be a finance expert. You need a plan, a weekly habit, and a tool that doesn't fight you.
Presusimple is built for monthly budgeting: create categories, set limits, log expenses in seconds, and see at a glance whether you're on track. Try it free for 30 days — start budgeting now.
Your future self—the one who isn't stressed on the 28th—will thank you.