Fill in your company info, client details, and line items to generate an invoice.
How It Works
Enter your company information, client details, and add line items for each product or service. The invoice preview updates in real time as you type. You can add or remove line items, set quantities and prices, and apply a tax rate. Fill company details, client information, line items with quantity and unit price, tax rate, and currency. Live preview updates as you type for freelancers and small businesses. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms. Line item descriptions should match contract scope so finance teams approve payment without back and forth email.
Once your invoice is ready, click the Download PDF button. The jsPDF library generates a professional PDF document directly in your browser. All calculations happen on your device: no data is sent to any server, keeping your financial information private. Download PDF runs entirely in browser via print to PDF. No server stores your client data. Company fields persist in localStorage for faster repeat invoicing. Line item descriptions should match contract scope so finance teams approve payment without back and forth email. Browser PDF export keeps client pricing and tax IDs off third party servers, useful for confidential consulting work.
No server stores your client data. Company fields persist in localStorage for faster repeat invoicing. Line item descriptions should match contract scope so finance teams approve payment without back and forth email. Browser PDF export keeps client pricing and tax IDs off third party servers, useful for confidential consulting work.
Invoice Calculation
lineTotal = quantity × unitPrice
subtotal = sum of all lineTotals
taxAmount = subtotal × (taxRate / 100)
total = subtotal + taxAmount
Tax rate is applied as a percentage of the subtotal. Tax is simple percentage of subtotal. Compound tax rules and inclusive pricing are not modeled. Multi currency symbols format correctly in preview for EUR and GBP clients without manual conversion tables. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms.
Related Tools
Use with the Hourly Wage Converter to determine your service rates, or the Latte Factor Calculator to analyze recurring business expenses. Set hourly rates with Hourly Wage Converter and analyze recurring business costs with Latte Factor Calculator on portfolios.tools. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms.
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How It Works
Enter your company information, client details, and add line items for each product or service. The invoice preview updates in real time as you type. You can add or remove line items, set quantities and prices, and apply a tax rate. Fill company details, client information, line items with quantity and unit price, tax rate, and currency. Live preview updates as you type for freelancers and small businesses. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms. Line item descriptions should match contract scope so finance teams approve payment without back and forth email.
Once your invoice is ready, click the Download PDF button. The jsPDF library generates a professional PDF document directly in your browser. All calculations happen on your device: no data is sent to any server, keeping your financial information private. Download PDF runs entirely in browser via print to PDF. No server stores your client data. Company fields persist in localStorage for faster repeat invoicing. Line item descriptions should match contract scope so finance teams approve payment without back and forth email. Browser PDF export keeps client pricing and tax IDs off third party servers, useful for confidential consulting work.
No server stores your client data. Company fields persist in localStorage for faster repeat invoicing. Line item descriptions should match contract scope so finance teams approve payment without back and forth email. Browser PDF export keeps client pricing and tax IDs off third party servers, useful for confidential consulting work.
Use Invoice Generator whenever inputs change: after market moves, new contributions, or revised personal assumptions. Bookmark the page for quick reruns without installing software.
Step by step
- Open Invoice Generator and enter your current inputs.
- Review calculated outputs and summary tables.
- Adjust assumptions and compare scenarios side by side.
Worked example
Enter your company information, client details, and add line items for each product or service. Enter the sample inputs described in How it works to reproduce the scenario step by step.
Adjust one input at a time to see sensitivity. Invoice Generator updates instantly so you can stress test optimistic and conservative assumptions before acting.
When to use this calculator
Reach for Invoice Generator when create and download professional invoices with automatic calculations. no server, no signup, complete privacy.. It suits quick what if analysis before trades, allocation changes, or plan updates.
Pair with related tools when the decision spans taxes, liquidity, or multi year projections beyond what one formula captures.
Common mistakes
Copying outputs without checking input units or stale market prices is a frequent error with Invoice Generator. Confirm tickers, percentages, and dates before acting.
Running a single baseline scenario ignores tail risks. Stress test with conservative inputs and compare against related tools listed below when the decision is material.
Invoice Calculation
lineTotal = quantity × unitPrice
subtotal = sum of all lineTotals
taxAmount = subtotal × (taxRate / 100)
total = subtotal + taxAmount
Tax rate is applied as a percentage of the subtotal. Tax is simple percentage of subtotal. Compound tax rules and inclusive pricing are not modeled. Multi currency symbols format correctly in preview for EUR and GBP clients without manual conversion tables. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms.
Limitations and assumptions
Tax rate is applied as a percentage of the subtotal. Tax is simple percentage of subtotal. Compound tax rules and inclusive pricing are not modeled. Multi currency symbols format correctly in preview for EUR and GBP clients without manual conversion tables. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms. Invoice Generator does not replace personalized advice. Fees, slippage, account specific rules, and behavioral constraints may change real world outcomes.
Key terms
- What is an invoice generator
- An invoice generator creates professional invoices with your company details, client information, line items, and calculates totals including tax.
- How does the invoice generator work
- Enter your company details (name, address, email), client details, and the products or services provided.
- Model assumption
- All data stays in your browser.
Compare alternatives
Use with the Hourly Wage Converter to determine your service rates, or the Latte Factor Calculator to analyze recurring business expenses. Use those calculators when invoice generator alone does not capture the full decision.
Internal links on portfolios.tools help you chain calculators: run Invoice Generator first, then validate edge cases with a specialized tool from the related section below.
FAQ
What is an invoice generator?
An invoice generator creates professional invoices with your company details, client information, line items, and calculates totals including tax. You can print or save as PDF directly from your browser. Professional invoices include unique invoice number, dates, itemized services, subtotal, tax, total due, and payment terms for client accounting. Persisted company profile saves ten minutes per invoice while client rows reset to protect customer privacy each session. Multi currency symbols format correctly in preview for EUR and GBP clients without manual conversion tables.
How does the invoice generator work?
Enter your company details (name, address, email), client details, and the products or services provided. The tool calculates subtotals, tax, and the total amount due. Use the print button to save as PDF. Subtotal sums line totals. Tax applies as percentage of subtotal. Total due equals subtotal plus tax amount. Multi currency symbols format correctly in preview for EUR and GBP clients without manual conversion tables. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms.
Is my data private?
All data stays in your browser. Your company information is saved in localStorage for convenience, but nothing is sent to any server. You control your data completely. All processing is client side. Company profile saves locally. Client and line items reset each session for privacy per invoice. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms. Line item descriptions should match contract scope so finance teams approve payment without back and forth email.
How do I download as PDF?
Use the Print / PDF button at the top of the invoice preview. Your browser will open the print dialog where you can choose Save as PDF. This generates a professional PDF document client side with no server interaction. Use browser print dialog and Save as PDF destination. Layout is optimized for US Letter and A4 paper sizes. Line item descriptions should match contract scope so finance teams approve payment without back and forth email. Browser PDF export keeps client pricing and tax IDs off third party servers, useful for confidential consulting work.
What should I include on an invoice?
Invoice laws vary by jurisdiction. Generally include: a unique invoice number, your business details, client details, clear description of goods/services, amounts, tax, payment terms, and due date. Consult a local accountant for compliance. Include legal business name, tax ID if required locally, payment instructions, and due date. Consult local rules for VAT or sales tax wording. Browser PDF export keeps client pricing and tax IDs off third party servers, useful for confidential consulting work. Persisted company profile saves ten minutes per invoice while client rows reset to protect customer privacy each session.
How do I use this invoice generator on phone or tablet?
Yes. Invoice Generator runs entirely in your mobile browser with the same formulas as desktop. Optional localStorage may remember inputs on your device when enabled in browser settings.
Where is my data stored when I use Invoice Generator?
Nowhere on our servers. Calculations execute locally in your browser. Optional localStorage saves form fields on your device only and never transmits portfolio numbers over the network.
Should I rely on Invoice Generator for tax or legal decisions?
No. Invoice Generator provides educational math only. Tax law, account rules, and personal circumstances vary. Consult a qualified tax or legal professional before transactions with material consequences.
Related Tools
Use with the Hourly Wage Converter to determine your service rates, or the Latte Factor Calculator to analyze recurring business expenses. Set hourly rates with Hourly Wage Converter and analyze recurring business costs with Latte Factor Calculator on portfolios.tools. Unique invoice numbers and clear due dates reduce client accounting delays and speed payment on net thirty terms.