Built for freelancers and small businesses, not accountants
No software to install, no template to fight with
Auto-calculated GST
Pick a rate — 5%, 12%, 18%, or 28% — and the subtotal, tax, and total are computed for you.
Unlimited free invoices
Generate as many invoices as your business needs — no account, no monthly limit.
Nothing kept on our servers
Your business and client details exist only long enough to build the PDF, then they're gone.
An invoice is more than a bill — it's a paper trail
For a freelancer or a small business owner, every invoice sent is also a record: proof of what was agreed, when it was billed, and how much tax was collected on it. A scribbled note in a notebook or a plain-text email doesn't hold up well when a client disputes an amount, or when it's time to file GST returns and reconcile exactly how much output tax was charged across a quarter. A properly structured invoice — with a unique invoice number, a clear date, itemized services, and the tax rate spelled out — solves both problems at once. It gives the client something professional and unambiguous to pay against, and it gives the business owner a clean paper trail that's actually usable at tax time, instead of a stack of inconsistent notes that need to be reconstructed from memory later.
How GST actually gets added to an invoice
Goods and Services Tax in India is calculated on the subtotal of an invoice — the sum of every line item's quantity multiplied by its rate — before anything else is added. If the applicable rate is 18%, the tax amount is simply 18% of that subtotal, and the total the client owes is the subtotal plus that tax amount. This tool automates exactly that calculation: as soon as items and a GST rate are entered, the subtotal, the GST amount, and the grand total are worked out and printed clearly on the generated PDF, so there's no manual arithmetic and no risk of a rounding mistake creeping into a client-facing document.
Which GST rate actually applies depends on what's being sold — goods and services in India are grouped into rate slabs, commonly 5%, 12%, 18%, and 28%, along with a 0% or exempt category for specific items. Most professional services (consulting, design, freelance development work) fall under the 18% slab, which is why it's selected by default here, but it's worth confirming the correct slab for a specific good or service against current GST council notifications rather than assuming — misclassifying a rate on an invoice can create reconciliation headaches later even though the invoice itself looks correct.
Who this invoice generator is built for
A few common situations
💻 Freelancers & consultants
Bill a client for a project or a month of work with a clean, numbered invoice instead of an ad-hoc email.
🏪 Small shop owners
Generate a GST-compliant bill for a bulk or B2B sale without needing full accounting software.
🛠️ Service providers
List out multiple services rendered — repairs, installations, sessions — with individual rates and quantities.
🧑🎨 Agencies & studios
Send a professional itemized invoice for a retainer, campaign, or one-off deliverable.
📦 Online sellers
Produce a PDF invoice to accompany a shipment or attach to a payment reminder.
🧾 One-off transactions
Create a single, non-recurring invoice for a one-time sale or service without setting up an account anywhere.
Common GST rate slabs
A general guide — always confirm the exact slab for your specific goods or services
| Rate | Typically applies to |
|---|---|
| 0% / Exempt | Certain essential goods and specifically exempted services |
| 5% | Household necessities, some food items, transport services |
| 12% | Processed foods, some business services, computers |
| 18% | Most professional and IT services, consulting, standard goods |
| 28% | Luxury items and select goods in the highest slab |
How this compares to the alternatives
A quick, factual look at ways to produce an invoice
| Method | Auto GST calculation | Professional PDF | Free |
|---|---|---|---|
| EkZapp Invoice Generator | Yes | Yes | Yes |
| Manually typed Word/Excel invoice | Manual math | Depends on template | Yes |
| Full accounting software | Yes | Yes | Usually paid |
Common problems people run into
The client is disputing the total on the invoice. Because the subtotal, GST amount, and total are all itemized separately on the PDF, it's easy to point to exactly which line the disagreement is about rather than arguing over one lump figure. Double-check that quantities and rates were entered correctly for each item — a single wrong quantity is the most common cause of an unexpected total.
Not sure which GST rate to select. The rate depends on the specific HSN or SAC classification of the goods or service being billed, not on the business type in general. When in doubt, check the classification against current GST notifications or ask an accountant — using the wrong slab on a real invoice can cause compliance issues even though the PDF itself generates fine either way.
Need to reuse the same invoice number by mistake. Invoice numbers should be unique and sequential for proper bookkeeping — a simple system like INV-001, INV-002 and so on, incremented manually each time, avoids duplicate numbers showing up in your records.
What makes an invoice usable in India
A functional Indian business invoice generally needs a few things to be genuinely useful, beyond just looking professional: a unique invoice number for tracking, the date of issue, clear seller and buyer details, an itemized breakdown of what's being billed, and — if GST is applicable — the GST number of the seller along with the tax rate and amount charged. Missing the GST number isn't necessarily a problem for a small, unregistered business below the GST threshold, which is why that field is optional here rather than required; but for anyone registered under GST, including it on every invoice is what allows a client to claim input tax credit on their end, which is often the actual reason a client is asking for a "proper" invoice in the first place rather than a casual bill.
Keeping a consistent invoice numbering pattern and dating every invoice accurately also matters more than it might seem at first, particularly at GST filing time — return periods are based on invoice dates, and a business reconciling its output tax liability for a quarter needs every invoice from that period accounted for cleanly. A habit of generating and saving a PDF copy of every invoice as it's issued, rather than trying to reconstruct records later from memory or scattered messages, saves considerable time when filing comes around.
Tips for getting paid on time
A due date on an invoice matters more than it seems — an invoice with no due date implicitly reads as "whenever," and clients, even well-meaning ones, tend to deprioritize open-ended requests behind anything with an explicit deadline. Setting a due date 7, 15, or 30 days out (whatever terms were agreed) gives both sides a concrete reference point, and it's the single easiest change that tends to speed up payment without any awkward follow-up conversation.
Writing a short, specific note in the notes field — the payment method, a UPI ID or bank reference, or simply "thank you for your business" — also reduces friction, since a client shouldn't have to email back asking how to pay. Keeping descriptions in the items table specific rather than vague ("Website homepage redesign — 3 revisions" instead of just "Design work") also heads off disputes before they start, since there's no ambiguity about what was actually delivered for the amount charged.
📖 How to create an invoice
Frequently asked questions
Is GST calculated automatically on the invoice?
Yes. Select a GST rate and the tool automatically works out the subtotal, the GST amount, and the final total before generating the PDF.
Is my invoice data saved on your servers?
No. The details you enter are used only to generate the PDF at that moment and are never stored afterward.
Can I add my GST number to the invoice?
Yes, there's an optional GST number field under your business details, which appears on the generated PDF if filled in.
How many line items can I add?
There's no fixed limit — use the "+ Add Item" button to add as many services or products as the invoice needs.
Can I use this for a non-GST invoice?
Yes. Select the 0% GST option and the tool generates a plain invoice with a subtotal and total but no tax line.
What file format does the invoice download as?
A PDF, ready to email directly to a client or print, with no extra formatting needed on your end.
Quick recap
A good invoice does two jobs at once — it tells a client exactly what they owe and why, and it gives the issuing business a clean, dated record for its own books. Filling in business and client details, listing items with quantity and rate, and picking the correct GST slab is all this tool needs to generate both a client-ready PDF and an accurate tax breakdown in one step. Nothing entered here is stored afterward, so it's worth saving the downloaded PDF somewhere organized — by client, by month, or by invoice number — since that record is what actually gets used later, whether that's chasing a late payment or filing a GST return.