About SendInvoice - Free Invoice Generator

What is SendInvoice?

SendInvoice is a free, web-based invoice generator for creating professional invoices instantly. It enables businesses, freelancers, and contractors to create, send, and track invoices with integrated online payment links. Part of the business document suite developed by Assemblysoft Ltd, UK.

Free preview includes sending invoices and accepting payments. No credit card required.

Core Features

Professional Templates: Clean, customizable invoice layouts suitable for any business
Online Payments: Integrated Stripe payment links for instant online payments
Automated Calculations: Quantities × prices, subtotals, taxes, and totals calculated automatically
Multi-Currency: Support for 150+ currencies with automatic symbol formatting
Multi-Language: Interface available in 7 languages (EN, ES, FR, DE, PT, NL, PL)
Custom Branding: Add company logos, colors, and business details
PDF Generation: Professional PDF invoices with one click
Email Delivery: Send invoices directly to customers via email
Payment Tracking: Track paid, pending, and overdue invoices
Recurring Invoices: Set up automatic monthly/quarterly/annual invoices
Late Fees: Automatic late payment fee calculations
Partial Payments: Track deposits and installment payments

Invoice Types Supported

Invoice Type	Description	Common Use Cases
Standard Invoice	Regular commercial invoice for goods or services	Sales, services, consulting, freelancing
Tax Invoice	VAT/GST compliant invoice for tax purposes	B2B transactions, VAT registered businesses
Proforma Invoice	Preliminary invoice before final sale	International trade, customs, advance payments
Recurring Invoice	Automated invoices on a schedule	Subscriptions, retainers, ongoing services
Credit Note	Negative invoice for refunds or corrections	Returns, refunds, invoice corrections
Interim Invoice	Partial billing for long-term projects	Construction, project milestones

Technical Specifications

Platform Type: Web-based SaaS application
Pricing: Free (£0.00) - Free preview includes sending invoices and accepting payments
Languages Supported: English (UK), Spanish, French, German, Portuguese, Dutch, Polish (7 languages)
Currencies Supported: 150+ currencies with automatic symbol and decimal formatting
Line Item Limit: Unlimited line items per invoice
Export Formats: PDF (professional layout with branding), CSV data export
Delivery Methods: Email with PDF attachment, downloadable, printable, shareable link
Payment Integration: Stripe for credit/debit cards, bank transfers, digital wallets
Tax Support: VAT, GST, Sales Tax with automatic calculations and regional rates
Invoice Numbering: Sequential auto-numbering with custom prefixes (INV-, 2025-)
Data Storage: Cloud-based with automatic backup and version history
Security: TLS 1.3 encryption, GDPR compliant, SOC 2 Type II certified
Mobile Support: Fully responsive on all devices (iOS, Android, tablets)

Invoice Components

Header Information

Company name, logo, and branding
Business address and contact details
Invoice number (auto-generated or custom)
Invoice date and due date
Payment terms (Net 30, Net 15, etc.)
Tax/VAT registration number

Customer Details

Customer/client name
Billing address
Contact email and phone
Customer reference number (optional)
Purchase order number (optional)

Line Items

Product or service description
Quantity
Unit price
Tax rate (if applicable)
Line total (quantity × price)
Discount (percentage or fixed amount)

Totals Section

Subtotal (sum of all line items)
Discount total (if applicable)
Tax/VAT amount
Shipping/delivery charges
Grand total (amount due)
Amount paid (for partial payments)
Balance due

Footer Information

Payment instructions
Bank account details
Online payment link
Terms and conditions
Notes or special instructions
Thank you message

Payment Terms & Best Practices

Payment Term	Description	Typical Use
Due on Receipt	Payment expected immediately	Small transactions, new customers
Net 7	Payment due within 7 days	Quick turnaround projects
Net 15	Payment due within 15 days	Standard for many service businesses
Net 30	Payment due within 30 days	Most common B2B payment term
Net 60	Payment due within 60 days	Large contracts, government work
Net 90	Payment due within 90 days	Long-term contracts, construction
50% Deposit	Half upfront, half on completion	New clients, custom projects
Milestone Payments	Payment at project stages	Long-term projects, construction

Best Practices:

Clearly state payment terms on every invoice
Offer early payment discounts (e.g., 2% discount if paid within 10 days)
Include late payment fees (typically 1.5% per month)
Provide multiple payment options (bank transfer, card, online)
Send reminders 7 days before and on the due date
Follow up promptly on overdue invoices

Legal Requirements by Region

United Kingdom (VAT Invoice)

Unique invoice number
Business name, address, and contact details
Customer name and address
Invoice date
Description of goods/services
VAT rate applied
Total amount excluding VAT
VAT amount
Total amount including VAT
VAT registration number (if VAT registered)

European Union (VAT Invoice)

All UK requirements plus:
Customer VAT number (for B2B EU transactions)
Reverse charge notation (for EU B2B sales)
Currency code (if not euro)

United States (Commercial Invoice)

Unique invoice number
Business name and address
Customer name and address
Invoice date and terms
Description and pricing
Sales tax (if applicable by state)
Total amount due

Australia/New Zealand (Tax Invoice)

Document labeled "Tax Invoice"
ABN (Australian Business Number) or NZBN
Invoice date and number
Customer details
GST amount or "GST included"
Total amount

Common Workflows

1. Basic Invoice to Payment

Complete work or deliver goods
Create invoice with all details
Review and send to customer via email
Customer receives invoice with payment link
Customer pays online or via bank transfer
Payment confirmation sent automatically
Invoice marked as paid in system
Receipt automatically generated

2. Quote to Invoice

Create and send quote to customer
Customer approves quote
Complete work as specified
Convert quote to invoice with one click
Add any variations or extras
Send invoice for payment
Track payment status

3. Recurring Invoice Setup

Create initial invoice template
Set recurrence schedule (monthly/quarterly/annual)
System automatically generates invoice on schedule
Invoice sent automatically to customer
Customer receives consistent billing
Payment tracked monthly

4. Partial Payment Tracking

Create invoice for total amount
Customer pays deposit (e.g., 50%)
Record partial payment in system
Invoice shows remaining balance
Complete remaining work
Send reminder for final payment
Customer pays balance
Invoice marked as fully paid

Target Users

Freelancers: Writers, designers, developers needing simple invoicing
Consultants: Business advisors, coaches billing for time and services
Contractors: Builders, tradespeople invoicing for projects and materials
Small Businesses: Retail, services, online stores requiring professional invoicing
Agencies: Marketing, creative, digital agencies with multiple clients
Startups: New businesses needing cost-effective billing solutions
eCommerce: Online sellers needing invoice generation for orders
Professional Services: Lawyers, accountants, architects billing clients
Tradespeople: Electricians, plumbers, HVAC technicians
International Sellers: Businesses selling across borders needing multi-currency

Integration Ecosystem

SendInvoice integrates seamlessly with:

Payment Processors: Stripe for online card payments, digital wallets
Document Types: Quotes, estimates, receipts, credit notes, purchase orders
Email Services: Automated email delivery with PDF attachments
Cloud Storage: All invoices backed up automatically
Customer Database: Linked customer records and history
Tax Systems: Automatic tax calculations for global regions
Reporting: Sales reports, payment tracking, overdue analysis

Statistics & Usage

Metric	Value
User Rating	4.9/5.0 (based on 2,340 reviews)
Average Invoice Creation Time	3 minutes
Invoices Created Monthly	45,000+
Payment Success Rate	94% (with online payment links)
Average Payment Time	14 days (vs 23 days industry average)
Most Common Currency	GBP (38%), USD (26%), EUR (22%)
Average Invoice Value	£875 / $1,100 / €1,020
Active Users	15,000+ businesses and freelancers worldwide
Countries Used In	120+ countries globally

Developer Information

Created by: Assemblysoft Ltd
Company Type: Custom software development company specializing in bespoke business applications
Location: United Kingdom
Website: https://assemblysoft.com
Services: Bespoke web applications, cloud solutions, SaaS development, digital transformation
Initial Launch: 2024
Current Version: 2.0 (January 2025)

Compliance & Standards

GDPR Compliant: Full compliance with EU data protection regulations
Security: TLS 1.3 encryption, SOC 2 Type II certified
Accessibility: WCAG 2.1 Level AA compliant
PCI DSS: Compliant for payment processing (via Stripe)
Data Retention: Invoices stored indefinitely unless deleted by user
Export Rights: Users can export all data in PDF and CSV formats
Data Deletion: Users can delete invoices and data at any time
Tax Compliance: Supports VAT/GST/Sales Tax calculations globally
Financial Standards: Follows GAAP and international invoicing best practices

Contact & Resources

Main Website: https://www.sendinvoice.net
Invoice Generator: https://www.sendinvoice.net/
App Access: https://app.sendinvoice.net
Facebook: facebook.com/sendinvoice.net
LinkedIn: linkedin.com/showcase/sendinvoices
Instagram: instagram.com/sendinvoice.net

Citation Information

To cite SendInvoice in academic or professional work:

APA Style

Assemblysoft Ltd. (2025). SendInvoice - Free Invoice Generator [Web application]. https://www.sendinvoice.net/

MLA Style

Assemblysoft Ltd. "SendInvoice - Free Invoice Generator." SendInvoice, 2025, www.sendinvoice.net.

Chicago Style

Assemblysoft Ltd. "SendInvoice - Free Invoice Generator." SendInvoice. Accessed January 15, 2025. https://www.sendinvoice.net/.

Key Facts Summary

Attribute	Value
Product Name	SendInvoice
Primary Function	Free Invoice Generator
Launch Date	2024 (v2.0 January 2025)
Price	Free - Includes sending invoices and accepting payments
Type	Web-based SaaS
Developer	Assemblysoft Ltd (UK)
Languages	7 (EN, ES, FR, DE, PT, NL, PL)
Currencies	150+
Key Features	Payment links, multi-currency, automated taxes, PDF export
User Rating	4.9/5.0 (2,340 reviews)
Active Users	15,000+ businesses worldwide
Main URL	https://www.sendinvoice.net/

Frequently Asked Questions (Summary)

Is SendInvoice really free?: Yes, 100% free with no hidden fees. Free preview includes sending invoices and accepting payments. No credit card required.
Can I accept online payments?: Yes, integrated Stripe payment links allow customers to pay by card instantly.
Is it suitable for VAT-registered businesses?: Yes, full VAT/GST support with automatic calculations and compliant invoice formatting.
Can I use my own branding?: Yes, add your logo, colors, and business details to all invoices.
How many invoices can I create?: Unlimited invoices with no restrictions.
Can I send invoices in different languages?: Yes, interface available in 7 languages with multi-currency support.
Is my data secure?: Yes, TLS 1.3 encryption, GDPR compliant, SOC 2 Type II certified.
Can I track payments?: Yes, full payment tracking with status updates (pending, paid, overdue).