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Skill · business strategy · IGNITION

Invoice Creator

Professional invoice templates with payment terms, tracking systems, follow-up workflows, and best practices for freelancers and small businesses.

What it is

Professional invoice templates with payment terms, tracking systems, follow-up workflows, and best practices for freelancers and small businesses. Use when the user asks about invoice creator, related techniques, best practices, or needs guidance in this domain. Do NOT use when the request is outside the scope of invoice creator or requires a different specialized skill.

A skill is a written procedure an agent loads when a job calls for it. This one is a single file, SKILL.md, and the whole file is on this page.

Part ofIGNITION
File
SKILL.md
Length
347 lines · 7 min read
Category
business strategy
License
Apache-2.0
Author
foundry-skills
Words
1,462

Paste it into any agent’s instructions (CLAUDE.md, AGENTS.md or a custom GPT), or add the team to Brainwrite and it arrives switched on.

Use it

Use this skill in Brainwrite.

  1. 1

    Add the IGNITION

    Its agents carry this skill. You preview every agent and skill first; skills arrive switched on and routines paused.

    Install in Brainwrite →
  2. 2

    Brief your Chief of Staff

    “Use the Invoice Creator skill for this: [describe the job]. Show me the plan first, and send, post or change nothing.”

  3. 3

    Approve what matters

    The agent follows the skill and brings the result back. Anything that sends, posts or changes data waits for your approval in Ask mode.

    How approvals work →

You are a freelance business operations specialist. Help the user create professional invoices, set up payment terms, track payments, and follow up on late invoices. Provide ready-to-use templates and automation tips.

When to Use

Use this skill when:

  • User asks about invoice creator techniques or best practices
  • User needs guidance on invoice creator concepts
  • User wants to implement or improve their approach to invoice creator

Do NOT use when:

  • The request falls outside the scope of invoice creator
  • User needs a different specialized skill for their specific situation
  • The topic requires professional consultation beyond general guidance

Invoice Template

=================================================================
                         INVOICE
=================================================================

FROM:                              INVOICE #: INV-________
[Your Name / Business Name]       DATE: _______________
[Your Address]                     DUE DATE: _______________
[City, State ZIP]
[Email]                            BILL TO:
[Phone]                            [Client Name]
[Tax ID / EIN if applicable]       [Client Company]
                                   [Client Address]
                                   [City, State ZIP]

-----------------------------------------------------------------
DESCRIPTION                        QTY    RATE      AMOUNT
-----------------------------------------------------------------
[Service/Product 1]                ___    $______   $________
[Service/Product 2]                ___    $______   $________
[Service/Product 3]                ___    $______   $________
[Service/Product 4]                ___    $______   $________

-----------------------------------------------------------------
                                   SUBTOTAL:        $________
                                   TAX (____%):     $________
                                   DISCOUNT:       -$________
                                   ----------------------------
                                   TOTAL DUE:       $________
-----------------------------------------------------------------

PAYMENT TERMS: _______________
PAYMENT METHODS:
  - Bank Transfer: [Account details]
  - PayPal: [email]
  - Other: [details]

NOTES:
_______________________________________________________________

LATE PAYMENT POLICY:
A fee of [1.5%] per month will be applied to overdue balances.

=================================================================
Thank you for your business!
=================================================================

Invoice Numbering Systems

SystemFormatExampleBest For
SequentialINV-001, INV-002INV-047Simple, low volume
Date-basedYYYYMM-##202601-03Easy date tracking
Client-basedCLIENT-##ACME-012Multiple clients
CombinedYYMM-CLIENT-##2601-ACME-03Full traceability

Never reuse or skip invoice numbers - this causes accounting problems.

Payment Terms

Standard Terms

TermMeaningBest For
Due on receiptPay immediatelySmall amounts, new clients
Net 15Due within 15 daysStandard freelance
Net 30Due within 30 daysEstablished clients, corporate
Net 45/60Due within 45-60 daysEnterprise contracts
50% upfront, 50% on deliverySplit paymentLarge projects
Monthly retainerDue 1st of each monthOngoing work

Payment Terms Language

Standard:
"Payment is due within 30 days of invoice date. A late fee of
1.5% per month will be applied to balances overdue by more than
15 days."

With Early Payment Discount:
"Payment due within 30 days. 2% discount if paid within 10 days
(2/10 Net 30)."

For Large Projects:
"50% due upon project commencement. Remaining 50% due upon
delivery and client approval. Late payments subject to 1.5%
monthly interest."

Retainer:
"Monthly retainer of $[amount] due on the 1st of each month.
Unused hours do not roll over. Additional hours billed at
$[rate]/hour."

Invoice Line Item Examples

By Service Type

Consulting / Hourly:

Strategy consultation (Jan 5-9)       8 hrs   $150/hr   $1,200.00
Client presentation preparation       3 hrs   $150/hr   $  450.00
Travel time (client site visit)       2 hrs   $ 75/hr   $  150.00

Project-Based / Fixed Fee:

Website redesign - Phase 1 (Design)   1       $3,500    $3,500.00
Website redesign - Phase 2 (Dev)      1       $5,000    $5,000.00
Content migration (42 pages)          1       $1,200    $1,200.00

Retainer + Overages:

Monthly retainer (January 2026)       1       $2,500    $2,500.00
Additional hours beyond retainer      4 hrs   $175/hr   $  700.00

Product + Service:

Custom logo design                    1       $800      $  800.00
Business card design                  1       $200      $  200.00
Print production (500 cards)          500     $0.15     $   75.00
Shipping                             1       $12.50    $   12.50

Payment Tracking

Invoice Tracker Template

INVOICE TRACKER
==============

Invoice #    Client      Amount     Sent      Due       Paid      Status
__________   ________    $______    ______    ______    ______    ________
__________   ________    $______    ______    ______    ______    ________
__________   ________    $______    ______    ______    ______    ________
__________   ________    $______    ______    ______    ______    ________

Status options: Sent | Viewed | Paid | Overdue | Disputed

MONTHLY SUMMARY:
Total invoiced:   $________
Total collected:  $________
Outstanding:      $________
Overdue:          $________

Follow-Up Workflow

Payment Reminder Schedule

WhenActionTemplate
Invoice sentConfirmation email"Invoice attached"
3 days before dueFriendly reminder"Gentle reminder"
Due dateDue date notice"Invoice due today"
7 days overdueFirst follow-up"Checking in"
14 days overdueSecond follow-up"Past due notice"
30 days overdueFinal notice"Urgent: payment required"
45+ days overdueEscalationPhone call or collection

Follow-Up Email Templates

3 Days Before Due:

Subject: Upcoming invoice - INV-[###] due [date]

Hi [Name],

Just a quick reminder that invoice INV-[###] for $[amount] is
due on [date]. Please let me know if you have any questions.

Payment can be made via [payment methods].

Thanks,
[Your name]

7 Days Overdue:

Subject: Invoice INV-[###] - payment overdue

Hi [Name],

I wanted to follow up on invoice INV-[###] for $[amount], which
was due on [date]. I understand things get busy - could you let
me know when I can expect payment?

If there's an issue with the invoice, I'm happy to discuss.

Thanks,
[Your name]

14 Days Overdue:

Subject: Past due: Invoice INV-[###] - $[amount]

Hi [Name],

Invoice INV-[###] for $[amount] is now 14 days past due (original
due date: [date]). Per our agreement, a late fee of [X%] may apply
to overdue balances.

Please arrange payment at your earliest convenience, or contact
me if there's an issue we need to resolve.

Best,
[Your name]

30+ Days Overdue:

Subject: Urgent: Invoice INV-[###] - 30 days past due

Hi [Name],

This is my third notice regarding invoice INV-[###] for $[amount],
originally due on [date]. The balance is now 30 days overdue.

I need to receive payment or a confirmed payment plan by [date,
1 week from now]. After that date, I may need to [pause work /
pursue other collection options].

Please respond to this email today with a status update.

Thank you,
[Your name]

Invoicing Tools

ToolCostBest For
WaveFreeFreelancers, simple invoicing
Invoice NinjaFree / $10/moOpen source, full featured
FreshBooks$17+/moTime tracking + invoicing
QuickBooks$30+/moFull accounting integration
Stripe Invoicing0.4-0.5% per invoiceOnline businesses
PayPal InvoicingFree (standard PayPal fees)Quick and universal
Square InvoicesFreeIn-person + online

Best Practices

PracticeWhy
Invoice immediately upon completionFaster payment
Include clear payment instructionsRemove friction
Use professional formattingBuilds trust
Keep copies of everythingTax and legal protection
Set up recurring invoices for retainersNever skip
Get written agreement before starting workPrevents disputes
Offer multiple payment methodsClient convenience
Send invoices on the same day each periodPredictability
Track everything (even small expenses)Tax deductions
Separate business and personal accountsClean records

Process

  1. Gather information. Ask the user clarifying questions to understand their specific situation, goals, and constraints
  2. Analyze context. Review the information provided and identify key factors relevant to invoice creator
  3. Develop recommendations. Apply domain expertise to create actionable guidance tailored to the user's needs
  4. Present structured output. Deliver findings in the output format below with clear next steps
  5. Address follow-ups. Answer additional questions and refine recommendations based on feedback

Output Format

## Invoice Creator Analysis

### Assessment
[Key findings and observations]

### Recommendations
1. [Primary recommendation]
2. [Secondary recommendation]
3. [Additional suggestions]

### Action Items
- [ ] [First action step]
- [ ] [Second action step]
- [ ] [Follow-up task]

Edge Cases

  • Incomplete information: Ask clarifying questions before proceeding with recommendations
  • Conflicting requirements: Prioritize the most critical constraint and note trade-offs
  • Out of scope requests: Redirect to appropriate specialized skill or professional resource
  • Beginner vs advanced: Adjust depth and terminology based on user's experience level

Example

Input: "Help me with invoice creator for my current situation"

Output:

Based on your situation, here is a structured approach to invoice creator:

  1. Assessment: Evaluate your current state and identify key areas for improvement
  2. Strategy: Develop a targeted plan based on best practices
  3. Implementation: Execute the plan with specific, measurable steps
  4. Review: Monitor progress and adjust as needed

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