A laboratory invoice tells the customer what they owe, what it is for, and when and how to pay. Send a laboratory invoice to companies, schools and partner clinics that pay after the tests, usually weekly or monthly. The free generator below is set up for diagnostic laboratories: add your items, due date and bank details, then download the PDF or send it on WhatsApp.
What to include on a Laboratory Invoice
- Your business name, address and phone number
- Invoice number, invoice date and payment due date
- Patient name
- Each item with quantity, price and line total
- Total amount due
- Your bank name, account number and account name
- Referring doctor
Example: a filled Laboratory Invoice
A logistics company sends 12 new drivers for pre-employment tests. The lab sends one invoice for the 12 medicals at the agreed price per person.
Full blood count (FBC): 1 x ₦8,000 = ₦8,000
Lipid profile: 1 x ₦15,000 = ₦15,000
Fasting blood sugar: 1 x ₦3,500 = ₦3,500
Urinalysis: 1 x ₦3,000 = ₦3,000
Total: ₦29,500. These amounts are examples; use your own prices.
Common mistakes to avoid
- Grouping tests as "lab tests" instead of naming each one
- Not recording which doctor or hospital referred the patient
- Billing a company without the list of staff tested
- Sending the invoice without a due date
Need a different document?
- Customer has already paid? Give a laboratory receipt.
- Customer wants a price before deciding? Send a proforma invoice first.
How diagnostic laboratories use an invoice
Diagnostic labs often work with referring doctors, hospitals and companies that send staff for pre-employment tests. Individual patients usually pay before samples are taken, but corporate clients and partner clinics are billed weekly or monthly.
Writing the items on a laboratory invoice
List each item or service on its own line, for example Full blood count, Lipid profile, Fasting blood sugar, with the quantity and the price for one unit. The generator adds up each line and the total due. Below the items, add the date you expect payment and your bank details, so the customer can pay the moment they open the invoice.
Tips for diagnostic laboratories
- Use the exact test names from your price list, so the patient can compare them with what the doctor requested.
- Add the referring doctor or hospital, which helps when a result or payment is queried.
- For company medicals, list each staff member’s tests or attach the staff list.
When the customer pays in parts
Keep the invoice open and give a receipt for each payment, showing the amount paid and the balance. When the last payment arrives, give a final receipt marked “Paid in full”.
Frequently asked questions
How do I bill a company for staff medical tests?
Send one invoice listing the tests (for example "Pre-employment medical x 12 staff"), with the agreed price per person, and attach the staff list.
Should a lab bill show the referring doctor?
It is good practice. Add it in the extra field, so the bill matches the request form.
What is the difference between an invoice and a receipt?
An invoice asks for payment and shows what is owed. A receipt confirms that payment has been made. Send the invoice first, then a receipt when you are paid.
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