How to Look Up an ABN: The Complete 2026 Guide
Learn how to look up and find an ABN number for free in 2026. Verify suppliers, check GST status, and find any business's ABN by name using QELab's real-time lookup tool.
How to Look Up an ABN: The Complete 2026 Guide
Need to verify a supplier, check whether a business is legitimate, or find the ABN number for a company you're about to do business with? An ABN lookup gives you the answer in seconds.
This guide covers everything: how to find an ABN number when you only know the business name, how to verify an ABN you already have, and how to interpret the results — all for free.
What is an ABN?
An Australian Business Number (ABN) is an 11-digit unique identifier assigned to every business operating in Australia. It's issued by the Australian Business Register (ABR) and is used for:
- Tax and invoicing — required on all tax invoices
- GST registration — businesses over the $75K turnover threshold must register
- Business identification — the single number that links a business to its tax obligations, entity type, and trading names
Every registered business entity — sole traders, partnerships, trusts, and companies — receives a unique ABN. It's the fastest way to confirm whether a business exists and what its current status is.
Why You Might Need to Look Up an ABN
There are several common scenarios where verifying or finding an ABN is essential:
- Verify a supplier or contractor before paying — Confirm the ABN on an invoice is real and active. If it's cancelled or doesn't exist, you may be dealing with a fraudulent entity.
- Check if a business is legitimate — Before engaging a new vendor, a quick ABN check confirms they're registered and operating.
- Confirm GST registration — If a supplier charges you GST but isn't registered, you can't claim input tax credits. An ABN lookup shows GST status instantly.
- Find the ABN for a business you know by name — You need to include an ABN on a payment or form but only know the business name. A name-based search finds it instantly.
- Due diligence and KYC compliance — Under AUSTRAC Tranche 2 (effective July 1, 2026), accountants, lawyers, and real estate agents must verify client businesses as part of Customer Due Diligence (CDD).
- Research potential business partners — Check entity type, registration date, state, and trading names before entering a commercial relationship.
How to Find an ABN Number (When You Only Know the Business Name)
This is one of the most common situations: you know the company or person you're dealing with, but you don't have their ABN. Maybe you need it for an invoice, a contract, a government form, or a compliance check.
Step-by-step: Find any business's ABN by name
This works for any type of business: companies (Pty Ltd), sole traders, partnerships, trusts, and government entities. You can search by:
- Legal name — the official registered name (e.g., "Smith Consulting Pty Ltd")
- Trading name — the name the business operates under (e.g., "Smith & Co")
- Person's name — for sole traders registered under their own name
> 👉 Find any ABN now: Search by business name →
What if multiple results come back?
If the name is common, you may get several matches. Use these fields to identify the right one:
- State/Territory — narrow down by location
- Entity Type — Company vs Sole Trader vs Trust
- ABN Status — Active vs Cancelled
- Registration Date — helps distinguish between similar businesses
For more advanced filtering (by state, industry, postcode, etc.), use QELab ABN Search which offers full filter controls across 20.1 million ABNs.
Method 1: QELab Free ABN Lookup (Recommended)
Whether you're verifying an ABN you already have or finding one for the first time, QELab's free ABN Lookup is the fastest tool available. It searches across 20.1 million ABNs and 7.5 million business names with real-time verification from the Australian Business Register.
How to use it:
Why QELab over other tools:
- Real-time data — verified directly against the ABR API, with a live timestamp showing when the data was retrieved
- Search by name or number — don't have the ABN? Search by business name instead
- No registration required — no sign-up, no login, completely free for single lookups
- Compliance Quick Check — shows whether the business exists, ABN is active, GST status confirmed, and data source attribution — all in one glance
- Fast — results in under a second
> 👉 Try it now: Look up any ABN for free →
Method 2: Government ABR Website
The official lookup tool is at abr.business.gov.au. It's maintained by the Australian Taxation Office and is the ultimate source of truth for ABN data.
How to use it:
Limitations:
- Basic results — less context than QELab's Compliance Quick Check format
- No bulk capability — one lookup at a time, no way to verify a list
- Occasional downtime — the site can be slow or return errors during peak periods
- Limited filtering
The ABR site is fine for a single quick check, but if you're verifying multiple businesses or need a richer result format, QELab is the better option.
How to Validate an ABN Checksum
Every ABN follows a mathematical validation algorithm. The checksum uses a weighted mod-89 calculation:
Important caveat: A valid checksum only means the number is formatted correctly. It does NOT mean the ABN is active or belongs to a real business. You still need to verify the actual status via a lookup. Scammers can easily generate structurally valid ABNs — always confirm with a live lookup.
> Need to generate valid test ABNs for development? Try the QELab ABN Generator — it creates mathematically valid ABNs that pass checksum validation but don't belong to real businesses.
What the Lookup Results Tell You
When you look up an ABN on QELab, the result card shows:
Field | What it means |
|---|---|
| ABN Status | Active = operating business. Cancelled = no longer registered. |
| Entity Type | Individual/Sole Trader, Company, Trust, Partnership, etc. |
| GST Status | Whether the business is registered for GST (and since when). |
| State/Territory | Where the business is registered. |
| Registration Date | When the ABN was first issued. |
| Business Age | How long the business has been registered. |
| Trading Names | Other names the business operates under. |
| Legal Name | The registered legal entity name. |
The Compliance Quick Check section additionally confirms: business exists ✓, ABN is active ✓, GST status confirmed ✓, and shows the data source and retrieval timestamp for audit purposes.
Bulk ABN Lookups: Verifying Multiple ABNs at Once
If you need to verify more than a handful of ABNs — say a supplier list, a CRM database, or a client portfolio for AUSTRAC compliance — single lookups aren't practical.
For bulk verification, use QELab ABN Search:
- Filter by state, entity type, GST status, industry, postcode, and business age
- Preview matching results in the browser for free
- Download the full dataset as CSV for your records
- Verify large lists by matching against the 20.1M+ record database
The pricing for bulk downloads is transparent: $10 flat for up to 1,000 records, then volume-based pricing for larger datasets. You can get a quote instantly before committing.
> Need to verify a batch of ABNs? Try ABN Batch Verify — paste up to 20 ABNs and get instant status checks in a table.
Frequently Asked Questions
Is ABN lookup free?
Yes. QELab's ABN Lookup is completely free for individual searches. No registration, no limits on single lookups. Bulk downloads of filtered datasets are paid (from $10).
How do I find an ABN number for a business?
Go to QELab ABN Lookup and type the business name or trading name in the search box. It searches across 7.5 million registered names and returns the ABN, status, entity type, and other details instantly. No registration required.
Can I look up an ABN by name?
Yes. Enter a business name or trading name in the search box on QELab ABN Lookup and it will search across 7.5 million registered business names to find the matching ABN.
How often is ABN data updated?
QELab uses real-time verification via the ABR API for individual lookups. The timestamp on each result shows exactly when the data was retrieved. The search/filter database is updated monthly from the ABR bulk extract.
Can I look up an ABN from overseas?
Yes. There's no geographic restriction. You don't need an Australian phone number or address. The tool works from anywhere in the world.
What's the difference between ABN lookup and ABN search?
ABN Lookup is for checking a specific business — you already have an ABN or business name and want to verify it or find the ABN. ABN Search is for discovering businesses using filters (state, industry, entity type, etc.) and downloading lists. Read our full guide to ABN Search →
What's the difference between finding an ABN and generating a test ABN?
Finding an ABN means locating the real ABN number assigned to an actual Australian business — use ABN Lookup for that. Generating a test ABN means creating mathematically valid but fake ABN numbers for software testing — use the ABN Generator for that. They serve completely different purposes.
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Next Steps
- Look up an ABN now → — free, instant, real-time verification
- Search ABNs by name, state & industry → — find and filter Australian businesses
- AUSTRAC Tranche 2 compliance guide → — check if the new AML/CTF obligations affect you
- ABN vs ACN: What's the difference? → — understand the two key business identifiers
- ABN Search by name guide → — detailed filtering and download walkthrough