Invoice Generator

About Invoice Generator

What You Can Include on the Invoice

Section	Fields	Notes
Sender (your details)	Company name, address	Appears in the invoice header
Recipient	Client name, address	Appears as the "Bill To" section
Invoice details	Invoice number, date, due date	Sequential numbering is your responsibility
Line items	Description, quantity, unit price (line total calculated automatically)	Add as many rows as needed
Tax	Tax rate percentage	Applied to the subtotal; optional
Discount	Discount percentage	Applied before tax; optional
Currency	USD, EUR, GBP, JPY, CAD, AUD, CHF, CNY, INR, BRL	Affects the currency symbol displayed
Notes	Payment terms, bank details, thank-you message	Free text area at the bottom of the invoice

How the Calculations Work

The generator uses a straightforward order of operations: discount is applied to the subtotal first, then tax is calculated on the discounted amount. This matches how most accounting systems handle invoice maths.

Calculation	Formula	Example
Line total	Quantity x Unit price	5 hours x $100/hr = $500
Subtotal	Sum of all line totals	$500 + $200 = $700
Discount	Subtotal x Discount %	$700 x 10% = $70 discount
Discounted subtotal	Subtotal - Discount	$700 - $70 = $630
Tax	Discounted subtotal x Tax %	$630 x 20% = $126
Total	Discounted subtotal + Tax	$630 + $126 = $756

Worked example: A freelance web developer completes a project with three line items: "Homepage design" (1 x $1,200), "Blog template" (1 x $600), and "Revisions" (3 hours x $80/hr = $240). The subtotal comes to $2,040. The client negotiated a 5% discount, so the discount amount is $2,040 x 0.05 = $102, bringing the discounted subtotal to $1,938. With 20% VAT applied, the tax is $1,938 x 0.20 = $387.60, and the final invoice total is $1,938 + $387.60 = $2,325.60.

What Must an Invoice Include?

Legal requirements for invoices vary by country, but most tax authorities expect the same core information. Missing a required field can delay payment or cause problems at tax time.

Element	UK Requirement	US Requirement
Your name or business name	Required	Required
Your address	Required	Required
Client name and address	Required	Recommended
Unique invoice number	Required (sequential)	Recommended
Invoice date	Required	Required
Description of services/goods	Required	Required
Amount and currency	Required	Required
VAT number (if registered)	Required if VAT-registered	N/A
VAT breakdown	Required if VAT-registered	N/A (sales tax varies by state)
EIN or Tax ID	N/A	Recommended
Payment terms	Recommended	Recommended

In the UK, HMRC requires self-employed individuals and businesses to issue invoices that include a unique sequential number, the date, and a clear description of the goods or services provided. If your taxable turnover exceeds the VAT registration threshold of £90,000 (as of April 2026), you must also include your VAT number and show the VAT amount separately. Invoices should be kept for at least six years.

In the US, there is no single federal law dictating invoice format, but the IRS expects clear records of income for tax purposes. Including your EIN (Employer Identification Number), a unique invoice number, and itemised descriptions makes your records audit-ready. Some states also require sales tax to be shown separately on invoices.

Standard Payment Terms Explained

Payment terms tell the client when the invoice is due. The most common terms are expressed as "Net X", meaning the full amount is due within X days of the invoice date.

Term	Meaning	Best For
Due on receipt	Payment expected immediately	Small one-off jobs, retail
Net 7	Due within 7 days	Ongoing freelance work with trusted clients
Net 14	Due within 14 days	Small to mid-size projects
Net 30	Due within 30 days	Industry standard for most B2B work
Net 60	Due within 60 days	Large corporations, government contracts
2/10 Net 30	2% discount if paid within 10 days, otherwise due in 30	Encouraging early payment
50% upfront	Half before work starts, half on completion	Large projects, new client relationships

Net 30 is the default standard in most industries. According to a 2025 QuickBooks report, 62% of UK small businesses dealt with unpaid invoices, with the average outstanding balance reaching £21,400 per business. In the US, Atradius research found that only 36% of B2B invoices are paid on time, with the average payment arriving 7 to 8 days past the due date. Setting clear terms upfront and following up promptly makes a real difference to cash flow.

Common Invoice Scenarios

Scenario	Line Item Setup	Tax / Discount
Freelance developer billing hourly	One row per task: "Frontend development - 20 hrs x $100"	VAT at your country's rate; no discount
Graphic designer per-project	One row per deliverable: "Logo design - 1 x $500"	VAT if applicable
Contractor materials + labour	Separate rows for materials and labour hours	VAT on the total; quantity discount for large orders
Consulting retainer	One row: "Monthly retainer - January 2026 - 1 x $3,000"	VAT if applicable
Product sale	One row per product with quantity and unit price	Sales tax at your local rate

How to Avoid Late Payments

Late payment is one of the biggest cash flow problems for small businesses and freelancers. A few practical steps can reduce the risk:

• Send the invoice immediately. The longer the gap between completing work and sending the invoice, the longer the payment cycle. Issue the invoice on the same day the work is delivered or the milestone is reached.
• State payment terms clearly. Include the due date on the invoice itself, not just in a separate email. "Payment due: 15 May 2026" is clearer than "Net 30" for many clients.
• Offer multiple payment methods. List bank transfer details, PayPal, or a payment link in the notes section. The easier it is to pay, the faster the money arrives.
• Follow up at set intervals. A polite reminder at 7 days overdue and a firmer one at 14 days is standard practice. In the UK, the Late Payment of Commercial Debts (Interest) Act 1998 allows businesses to charge statutory interest of 8% plus the Bank of England base rate on overdue invoices, along with fixed compensation of £40 to £100 depending on the debt size.
• Consider milestone billing. For projects over £2,000 or $2,500, splitting the invoice into stages (e.g. 50% upfront, 50% on completion) reduces the risk of a single large unpaid invoice.

Printing and Saving as PDF

The invoice preview is styled with a clean layout optimised for printing. Click the Print / Save as PDF button to open your browser's print dialog. The tool UI is hidden during printing so only the invoice appears on the page.

Action	How
Save as PDF	In the print dialog, select "Save as PDF" as the destination
Print directly	Select your printer and print
Email to client	Save as PDF first, then attach to an email

Once saved, the PDF can be attached to emails, uploaded to cloud storage, or printed for physical records. Most accounting rules require keeping invoices for at least six years (UK) or three years (US IRS minimum, though seven years is recommended for businesses).

Invoice Numbering Best Practices

A consistent invoice numbering system keeps records organised and makes life easier at tax time. There is no single correct format, but the number must be unique and sequential. Some common approaches:

• Simple sequential: INV-001, INV-002, INV-003. Works well for freelancers with a single client base.
• Year-prefixed: 2026-001, 2026-002. Resets each year, making it easy to see which tax year an invoice belongs to.
• Client-coded: ACME-001, ACME-002. Useful if you frequently invoice the same clients and want to see history at a glance.
• Date-based: 20260416-01, 20260416-02. Groups invoices by date, good for high-volume billing.

Avoid starting from INV-001 if you want clients to think your business is established. Starting from INV-100 or INV-1001 is a common tactic. The important thing is that numbers never repeat and always increase.

Common VAT and Sales Tax Rates

When setting the tax rate on your invoice, use the rate that applies to your jurisdiction and the type of goods or services provided. Here are the standard rates for some of the most common countries as of 2026:

Country	Standard VAT / Sales Tax	Reduced Rates
United Kingdom	20%	5% (energy, child seats), 0% (food, books, children's clothing)
United States	No federal sales tax; state rates 0-7.25%	Varies by state and product type
Germany	19%	7% (food, books, public transport)
France	20%	5.5% (food, books), 10% (restaurants)
Canada	5% GST + provincial (0-10%)	Varies by province
Australia	10% GST	0% (fresh food, medical, education)
Japan	10%	8% (food, non-alcoholic drinks)
India	18% GST (standard)	5%, 12%, 28% depending on category

For a quick way to work out the VAT on any amount, the VAT Calculator covers rates for 12+ countries with add/remove options. Need to figure out the discount amount before tax? The Discount Calculator handles both percentage and fixed discounts. For invoices that need detailed tax breakdowns by line item, the Invoice Tax Calculator can help.

Sources

• GOV.UK - Invoicing and taking payment
• GOV.UK - When to register for VAT
• QuickBooks UK - 2025 Small Business Late Payments Report
• DocuClipper - Accounts Payable Statistics 2025
• Late Payment of Commercial Debts (Interest) Act 1998