June 12, 2026 · Lazare Kolebka

How to Make a Monthly Budget on Your iPhone

To make a monthly budget on your iPhone, list your monthly income, subtract fixed bills, set spending limits for a few categories, then track every purchase against those limits and adjust at the end of the month. The whole setup takes about ten minutes, and a budgeting app like Brim keeps it on your phone so you can update it anywhere.

What is a monthly budget?

A monthly budget is a plan for how you’ll spend and save your money over one month. You decide in advance how much goes to each category — rent, groceries, eating out, savings — so that your spending matches your income instead of drifting past it.

How do I create a monthly budget in 5 steps?

  1. Add up your monthly income. Use your take-home (after-tax) pay, plus any other regular income.
  2. List your fixed costs. Rent or mortgage, utilities, subscriptions, loan payments — anything that’s the same every month.
  3. Set limits for flexible categories. Groceries, dining, transport, shopping. These are where most budgets succeed or fail.
  4. Track every transaction. Log purchases as they happen so the numbers stay current. In Brim you can add a purchase with a double-tap on the back of your iPhone.
  5. Review and adjust monthly. Compare what you planned to what you spent, then tweak next month’s limits.

How much should I budget for each category?

A common starting point is the 50/30/20 rule: 50% of income to needs, 30% to wants, and 20% to savings and debt repayment. Treat it as a baseline, not a law — adjust the percentages to fit your rent, city, and goals.

Why budget on your phone instead of a spreadsheet?

Your phone is always with you, so you can log a purchase the moment it happens instead of trying to remember it later. Brim keeps your data on-device with iCloud sync, so your budget stays private and stays in sync across your iPhone, iPad, and Mac.

Frequently asked questions

Do I need to connect my bank account? No. Brim is designed to work without a bank connection — you can add transactions manually, by double-tap, or by importing a CSV.

What’s the easiest way to start? Pick three categories you overspend on, set a limit for each, and track only those for the first month. Add more once the habit sticks.