Zero-Based Budget
How to set up and use the Zero-Based budget method in Forbidden Finance, where every dollar is assigned a job.
Overview
Zero-Based budgeting means you allocate every single dollar of your income to a specific purpose until your unassigned amount reaches exactly zero. Nothing is left floating -- every dollar has a job, whether that is rent, groceries, entertainment, or savings. This method gives you the most detailed control over your money and is available on Starter tier and above.
The power of Zero-Based budgeting is visibility. At any point in the month, you can see exactly how much you have left in each category, whether you are overspending anywhere, and how much is still unassigned. The goal is always to get that unassigned number to $0.00.
How to Set Up a Zero-Based Budget
Open the Budget Wizard
Navigate to Budget and tap Create Budget. Select Zero-Based from the method list.
Enter your monthly income
Enter your total monthly take-home pay.
Create your groups
Define the groups that make sense for your life. Common examples include Housing, Food, Transportation, Personal, Savings, and Debt. You can name them anything you want and create as many as you need.
Allocate amounts to each group
Assign a dollar amount or percentage to each group. As you allocate, the wizard shows your remaining unassigned amount. Keep going until it hits $0.00.
Assign categories to groups
Drag your spending categories into the appropriate groups. For example, put Groceries and Dining Out under your Food group.
Activate your budget
Confirm everything looks right and tap Activate.
Reading Your Progress
Each group displays:
| Metric | What It Means |
|---|---|
| Allocated | The amount assigned to this group |
| Spent | Total spending in categories within this group |
| Remaining | Allocated minus Spent -- how much is left |
| Group subtotal | Sum of all category spending within the group |
The top of the budget screen shows the Unassigned amount. During setup, your goal is to get this to $0.00. During the month, it may fluctuate if you receive unexpected income or make mid-month adjustments.
Example Setup
Monthly income: $5,500
| Group | Allocated | Categories |
|---|---|---|
| Housing | $1,800 | Rent, Renter's Insurance |
| Food | $600 | Groceries, Dining Out, Coffee |
| Transportation | $400 | Gas, Car Insurance, Maintenance |
| Utilities | $250 | Electric, Internet, Phone |
| Personal | $350 | Clothing, Haircuts, Subscriptions |
| Entertainment | $200 | Streaming, Movies, Games |
| Health | $150 | Gym, Vitamins |
| Savings | $1,000 | Emergency Fund, Vacation Fund |
| Debt | $750 | Student Loan, Credit Card |
| Unassigned | $0.00 |
Ten days into the month, your Food group shows $200 spent out of $600 allocated, leaving $400 remaining. Your Entertainment group shows $180 spent out of $200, leaving just $20 for the rest of the month.
Rollover
If you underspend in a group, the leftover can optionally roll over to the next month. For example, if you allocate $200 to Entertainment but only spend $150, the extra $50 carries forward, giving you $250 for Entertainment next month. You can enable or disable rollover per group in your budget settings.
Tips
Frequently Asked Questions
What if I overspend in one group?
Use inter-category transfer to move money from an underspent group to cover the overage. For example, if you overspent on Food by $50, transfer $50 from Entertainment or Personal to balance it out.
Do I need to re-enter everything each month?
No. Your budget carries forward to the next month with the same allocations. You can adjust amounts before the month starts, but you do not need to rebuild from scratch.
What happens if I get extra income mid-month?
Your unassigned amount increases. Allocate the extra income to a group (such as Savings or a goal) to bring unassigned back to $0.00.
How many groups can I create?
There is no hard limit. Create as many groups as you need to organize your spending meaningfully. Most people use between 6 and 12 groups.
Related Articles
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Similar detail level with hard spending caps.50/30/20 Budget
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How to change methods without losing data.Choosing a Method
Compare all 9 methods.Need more help? Contact us at support@403fin.io.
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