ChatGPT Professional Invoice & Payment Terms Writer Prompt
Write professional invoice copy, payment terms, and a follow-up sequence that gets you paid faster and reduces disputes.
Category
💰 Finance
Difficulty
Beginner
Models
3
Last Updated
2026-06-29
Works with
📄 Example output
⚠️ Common Mistakes
❓ FAQ
⚙️ Fill in your variables
📋 Prompt
You are a freelance business coach who helps self-employed professionals get paid on time.
Business type: [freelancer/agency/consultant/product seller]
Service: [what you are invoicing for]
Client type: [individual/small business/enterprise]
Payment terms: [due on receipt/net-15/net-30]
Late payment concern: [often late/sometimes/no issue]
Task:
1. LINE ITEM DESCRIPTIONS: Professional specific language — not vague like 'services rendered'
2. PAYMENT TERMS LANGUAGE: Clear terms for your situation
3. LATE PAYMENT CLAUSE: What happens if they pay late
4. EARLY PAYMENT INCENTIVE: Optional gesture to encourage faster payment
5. INVOICE EMAIL TEMPLATE: Subject and body to send with the invoice
6. FOLLOW-UP SEQUENCE: 3 emails — 3, 7, and 14 days overdue
7. PREVENTION TIPS: 3 things to do before starting work to reduce disputes
Business type: [freelancer/agency/consultant/product seller]
Service: [what you are invoicing for]
Client type: [individual/small business/enterprise]
Payment terms: [due on receipt/net-15/net-30]
Late payment concern: [often late/sometimes/no issue]
Task:
1. LINE ITEM DESCRIPTIONS: Professional specific language — not vague like 'services rendered'
2. PAYMENT TERMS LANGUAGE: Clear terms for your situation
3. LATE PAYMENT CLAUSE: What happens if they pay late
4. EARLY PAYMENT INCENTIVE: Optional gesture to encourage faster payment
5. INVOICE EMAIL TEMPLATE: Subject and body to send with the invoice
6. FOLLOW-UP SEQUENCE: 3 emails — 3, 7, and 14 days overdue
7. PREVENTION TIPS: 3 things to do before starting work to reduce disputes
LINE ITEMS:
Phase 1 Discovery and Architecture (Weeks 1-2): 1200
Includes: requirements workshop, information architecture, wireframes for 8 pages, technical specification
Phase 2 Design and Development (Weeks 3-6): 2800
Includes: responsive design, CMS integration, contact forms, mobile optimisation, 2 revision rounds
Phase 3 Testing, Launch and Handover (Weeks 7-8): 600
Includes: cross-browser testing, performance optimisation, training session 1hr, 14-day post-launch support
PAYMENT TERMS:
Payment due: 15 days from invoice date | Accepted: bank transfer, PayPal
50% deposit required before work commences
LATE PAYMENT CLAUSE:
Invoices unpaid after 15 days incur interest at 8% per annum above Bank of England base rate (Late Payment of Commercial Debts Act 1998).
FOLLOW-UP DAY 3:
Subject: Invoice [N] Friendly Reminder
Hi [Name], A friendly reminder that Invoice [N] for [amount] was due on [date]. If payment has been sent please ignore this. Any questions, happy to help. [Your name]
Phase 1 Discovery and Architecture (Weeks 1-2): 1200
Includes: requirements workshop, information architecture, wireframes for 8 pages, technical specification
Phase 2 Design and Development (Weeks 3-6): 2800
Includes: responsive design, CMS integration, contact forms, mobile optimisation, 2 revision rounds
Phase 3 Testing, Launch and Handover (Weeks 7-8): 600
Includes: cross-browser testing, performance optimisation, training session 1hr, 14-day post-launch support
PAYMENT TERMS:
Payment due: 15 days from invoice date | Accepted: bank transfer, PayPal
50% deposit required before work commences
LATE PAYMENT CLAUSE:
Invoices unpaid after 15 days incur interest at 8% per annum above Bank of England base rate (Late Payment of Commercial Debts Act 1998).
FOLLOW-UP DAY 3:
Subject: Invoice [N] Friendly Reminder
Hi [Name], A friendly reminder that Invoice [N] for [amount] was due on [date]. If payment has been sent please ignore this. Any questions, happy to help. [Your name]
🏆
💡 Pro Tips
Best model for this prompt
ChatGPT
ChatGPT (GPT-4o / GPT-5)
A 50% deposit before starting work is the most effective protection against non-payment — it is industry standard
Specific line item descriptions make disputes far less likely than broad descriptions
Net-15 terms with a clear late fee clause get paid faster than net-30 with no stated consequence
Reference the contract or proposal number on every invoice — ties payment to a document both parties signed
Vague line items — consulting 2000 invites disputes; specific deliverables do not
No late payment clause — clients who know there is no consequence will deprioritise your invoice
Not sending a reminder before the due date — a 3-day-before reminder dramatically increases on-time payment
Starting work before receiving a deposit from new clients
- What payment terms should I use?Net-15 for regular clients with good history. Net-30 for enterprise clients who require it. Due on receipt for one-off projects or new clients. Avoid net-60 where possible.
- Can I legally charge interest on late invoices?In the UK, the Late Payment of Commercial Debts Act 1998 allows 8% per annum above Bank of England base rate on B2B invoices automatically. This is educational, not legal advice.
- What if a client disputes the invoice?A signed proposal specifying exact deliverables and price before starting work makes disputes very difficult to sustain. Invoice line items should match the proposal exactly.
- Best model?ChatGPT is faster for invoice templates and professional email copy. Claude is better when the situation is complex — disputed projects, enterprise clients, sensitive relationships.