25+ AI Billing Prompts — Invoice, Expense, Payment & Tax Templates

Create a professional invoice:
- From: [Your Business Name], [Your Address]
- To: [Client Name], [Client Address]
- Invoice #: [Number]
- Date: [Date]
- Services: [Description of work performed]
- Amount: $[Amount]
- Payment terms: [NET-15/NET-30/Due on receipt]
- Payment methods: [Bank transfer / credit card / check]
- Notes: [Any special terms or project references]

Generate an itemized hourly invoice:
- Client: [Client Name]
- Project: [Project Name]
- Billing period: [Start Date] to [End Date]
- Rate: $[Rate]/hour

Hours breakdown:
- [Task 1]: [X] hours
- [Task 2]: [X] hours
- [Task 3]: [X] hours
- [Task 4]: [X] hours

Payment terms: [Terms]
Include subtotal, tax ([rate]%), and total.

Create a milestone-based invoice for [Client Name]:
- Project: [Project Name]
- Contract total: $[Total]
- This milestone: [Milestone Name] — [percentage]% of total = $[Amount]
- Deliverables completed: [List of deliverables]
- Date completed: [Date]
- Previous payments received: $[Amount]
- Remaining balance after this payment: $[Amount]
- Payment terms: [Terms]

Set up a recurring monthly invoice:
- Client: [Client Name]
- Service: [Monthly retainer / subscription / hosting / etc.]
- Amount: $[Amount]/month
- Billing date: [1st / 15th / last day] of each month
- Start date: [Date]
- Payment terms: Due on receipt
- Auto-send: Yes
- Include: [Any usage-based add-ons or variable costs]

Create an international invoice:
- From: [Your Business Name], [Your Country]
- To: [Client Name], [Client Country]
- Invoice currency: [Client's currency, e.g., EUR, GBP]
- Amount: [Amount in client currency]
- Exchange rate: [Rate] ([Your currency] equivalent: $[Amount])
- VAT/Tax: [Applicable rate or "Reverse charge applies"]
- Wire transfer details: [SWIFT/BIC, IBAN, Bank Name]
- Payment terms: [Terms]
- Notes: [Any withholding tax or compliance references]

Write a friendly payment reminder email:
- Client: [Name]
- Invoice #: [Number]
- Amount: $[Amount]
- Due date: [Date — 3 days from now]
- Tone: Warm, helpful — "just a heads-up"
- Include direct payment link: [URL]
- Keep it under 100 words

Write a professional payment follow-up:
- Client: [Name]
- Invoice #: [Number]
- Amount: $[Amount]
- Due date: [Date — X days ago]
- Days overdue: [Number]
- Tone: Professional, not aggressive — assume it's an oversight
- Ask for: Confirmation of payment timeline
- Include payment link: [URL]

Write a firm final payment notice:
- Client: [Name]
- Invoice #: [Number]
- Amount: $[Amount] (including $[late fee amount] in late fees per our agreement)
- Originally due: [Date]
- Days overdue: [Number]
- Previous reminders sent: [Dates]
- Tone: Firm but professional — not threatening
- State: Late fees of [rate]% per month have been applied per our contract terms
- Request: Payment within 5 business days
- Consequence if unpaid: [Account placed on hold / forwarded for collections review / work paused]

Write a payment plan proposal email:
- Client: [Name]
- Outstanding balance: $[Amount]
- Days overdue: [Number]
- Proposed plan: [Number] monthly payments of $[Amount each]
- First payment due: [Date]
- Tone: Collaborative — "let's find a solution that works"
- Condition: Work resumes upon receipt of first payment

Log these business expenses:
1. [Amount] at [Vendor] for [Item/Service] — [Category: office supplies / software / travel / meals / etc.] — [Date]
2. [Amount] at [Vendor] for [Item/Service] — [Category] — [Date]
3. [Amount] at [Vendor] for [Item/Service] — [Category] — [Date]

Categorize each by IRS Schedule C category. Flag any that might need documentation beyond the receipt.

Review my [Month] business expenses (pasted below). For each expense:
1. Confirm or correct the category
2. Flag potential non-deductible items
3. Calculate totals by category
4. Compare to [Previous Month] and flag unusual changes
5. Calculate business vs. personal percentage for mixed-use items

[Paste expense list]

I have a receipt with this information:
- Vendor: [Name on receipt]
- Date: [Date]
- Total: $[Amount]
- Items: [What was purchased]

Categorize this expense for a [sole proprietor / LLC / S-Corp] and suggest: (1) Schedule C category, (2) whether it's fully deductible or needs percentage allocation, (3) any documentation I should keep beyond the receipt.

Calculate my estimated quarterly tax payment:
- Filing status: [Single / Married filing jointly / etc.]
- State: [State]
- Year-to-date gross income: $[Amount]
- Year-to-date deductible expenses: $[Amount]
- Other income sources: [W-2 employment $X / investment income $X / none]
- Prior year total tax: $[Amount]
- Payments already made this year: $[Amount]
- Self-employment: Yes, [sole proprietor / LLC / S-Corp]

Calculate: Federal income tax, self-employment tax, and [State] state income tax. Show me the total quarterly payment and the breakdown.

Generate a year-end tax preparation checklist for a self-employed [role] in [State]. I need:
1. All required income documentation (1099s, payment records, etc.)
2. Deduction categories with common items I might forget
3. Home office deduction requirements and calculation method options
4. Vehicle deduction options (standard mileage vs. actual expense)
5. Retirement contribution deadlines and limits
6. Estimated tax payment reconciliation
7. Key deadlines for each item

I'm a self-employed [role]. Review this list of potential deductions and tell me which are likely deductible, partially deductible, or not deductible:

1. [Item] — $[Amount]
2. [Item] — $[Amount]
3. [Item] — $[Amount]
[Continue list]

For each: categorize, note any documentation requirements, and flag items that might trigger audit scrutiny.

I'm a [role] with [X years] experience in [City/Market]. My current rate is $[rate]/hour. Analyze my pricing:
1. Am I above, below, or at market rate for my skill set and experience?
2. What would a 10% and 20% increase look like in annual revenue (assuming [X hours/week] billable)?
3. How should I communicate a rate increase to existing clients?
4. Are there services I should price differently (flat rate vs. hourly)?

Help me price this project:
- Client: [Type — startup / enterprise / agency / etc.]
- Project: [Description]
- Estimated hours: [Range — e.g., 40-60 hours]
- My hourly rate: $[Rate]
- Client's budget (if known): $[Amount or "unknown"]

Should I bill hourly or flat rate? If flat rate, what buffer should I add for scope creep? What's the market rate for comparable projects? Draft a pricing proposal with 2-3 tier options.

Help me transition from hourly to value-based pricing for this service:
- Service: [What you do]
- Typical time investment: [Hours]
- Current hourly rate: $[Rate]
- Client outcome/value: [What the client gets — revenue increase, cost savings, etc.]
- Market rate for this outcome: [If known]

Propose a value-based price that reflects the client's ROI, not my hours. Include justification I can share with the client.

Forecast my cash flow for the next 30 days:

Expected inflows:
- Invoice #[X] — $[Amount] — due [Date]
- Invoice #[X] — $[Amount] — due [Date]
- Recurring revenue: $[Amount]/month from [X] clients

Expected outflows:
- Rent/mortgage: $[Amount] — due [Date]
- Software subscriptions: $[Amount total] — billed [Date]
- Contractor payments: $[Amount] — due [Date]
- Estimated quarterly tax: $[Amount] — due [Date]
- Other: [Items with amounts and dates]

Current bank balance: $[Amount]

Show me a week-by-week breakdown. Flag any weeks where I'll dip below $[safety threshold].

Analyze my client payment patterns:

[List each client with: name, average invoice amount, average days-to-payment, number of invoices in last 12 months, any late payments]

Rank them by reliability. For unreliable payers, suggest specific term changes. Identify any clients where I should require deposits or change to milestone billing.