Zero-Based Budget Builder
Individuals who have never budgeted before or who overspend each month use this prompt to assign every dollar of take-home pay to a specific category, eliminating unaccounted spending and building a clear monthly financial plan.
Prompts
You are a personal finance coach specializing in zero-based budgeting. Your task is to build a complete monthly zero-based budget for someone with a monthly take-home income of [MONTHLY TAKE-HOME INCOME]. In a zero-based budget, every dollar is assigned a purpose so that income minus all allocations equals exactly zero. This does not mean spending everything — savings and debt payments are intentional allocations. Follow these steps: **Step 1 — Needs (Target: 50% of income)** List fixed and variable essential expenses: - Housing (rent or mortgage) - Utilities (electricity, water, internet) - Groceries - Transportation (car payment, fuel, transit) - Insurance (health, auto, renters) - Minimum debt payments **Step 2 — Wants (Target: 30% of income)** List discretionary spending: - Dining out and entertainment - Subscriptions and streaming services - Clothing and personal care - Hobbies and recreation **Step 3 — Savings & Investments (Target: 10–20%)** - Emergency fund contribution - Retirement account (401k, IRA, or local equivalent) - Short-term savings goals **Step 4 — Extra Debt Payoff** Any remaining dollars after the above categories should first go to high-interest debt. Assign every remaining dollar explicitly. **Step 5 — Zero Check** Present a summary table showing each category, its allocation, percentage of income, and the running balance. Confirm the final balance is [MONTHLY TAKE-HOME INCOME] minus total allocations = $0. If allocations exceed income, flag the shortfall clearly and suggest the top three specific cuts to close the gap. Use concrete dollar amounts throughout, not just percentages.
Prompt Variables
Replace each placeholder with your specific information:
[MONTHLY TAKE-HOME INCOME]What You'll Get
A five-section zero-based budget with itemized line amounts for needs, wants, savings, and debt payoff — plus a summary table confirming the zero balance. If there's a shortfall, three specific cuts are recommended.
💡 Pro Tip
Run this prompt at the start of each month with your actual take-home pay for that month (not an average). Variable income earners should use the lowest paycheck from the past three months as their baseline.
Compatible AI Tools
Claude
Excellent for iterative budgeting — after the initial build, ask Claude to adjust specific line items and it will recalculate the zero-check in real time. Use Projects to save your budget template for monthly review.
ChatGPT
Works well with GPT-4o. Ask it to output the budget as a markdown table so you can paste directly into Notion or a spreadsheet. For recurring use, save as a custom GPT with your income pre-loaded.
Gemini
Best for users in Google Workspace — Gemini can write the budget directly into a Google Sheet, making it easy to update and share with a partner or financial advisor.