FBR Invoice Format 2026: Complete Specifications and Requirements

Understanding FBR Invoice Format Requirements

FBR mandates a specific format for digital invoices to ensure consistency, enable automated processing, and facilitate verification. This guide details every element required in a compliant FBR invoice for 2026.

Mandatory Header Information

Seller Details (Required)

Business Name: Legal registered name as per NTN
NTN: 7-digit National Tax Number
STRN: Sales Tax Registration Number (13 digits)
Address: Complete registered business address
Contact: Phone number and/or email

Buyer Details

For B2B Transactions (Required):

Buyer business name
Buyer NTN
Buyer STRN (if registered)
Buyer address

For B2C Transactions:

Buyer name (optional for small transactions)
CNIC (required above certain thresholds)

Invoice Identification

Required Fields

Invoice Number: Unique sequential number from your system
FBR Invoice Number (FIN): Assigned by FBR upon submission
Invoice Date: Date of supply (YYYY-MM-DD format)
Invoice Time: Time of generation (HH:MM:SS)
Invoice Type: Original, Revised, Credit Note, or Debit Note

Line Item Requirements

For Each Product/Service

Serial Number: Line item number (1, 2, 3...)
Description: Clear product or service description
HS Code: Harmonized System code for classification
Quantity: Number of units
Unit of Measure: Pieces, KG, Liters, etc.
Unit Price: Price per unit (excluding tax)
Discount: Any discount applied (amount or percentage)
Total Before Tax: Quantity × Unit Price - Discount
Tax Rate: Applicable GST rate (e.g., 18%, 0%)
Tax Amount: Calculated tax for this line
Line Total: Total including tax

Tax Summary Section

Required Breakdown

Subtotal: Sum of all line items before tax
Total Discount: Sum of all discounts
Taxable Amount: Amount subject to tax
Tax Rate(s): Each applicable rate listed separately
Total Tax: Sum of all tax amounts
Grand Total: Final amount including tax

Multiple Tax Rates

If invoice includes items with different tax rates, show separate breakdown:

Items at 18%: Amount and tax
Items at 0% (zero-rated): Amount
Exempt items: Amount

FBR-Specific Elements

QR Code

Size: Minimum 2cm × 2cm
Position: Clearly visible (typically top-right or bottom)
Content: FIN, verification URL, encrypted data

FBR Invoice Number (FIN)

Displayed prominently on invoice
Machine-readable format
Used for all verification purposes

HS Code Requirements

What are HS Codes?

Harmonized System codes are international product classification numbers. FBR uses them to:

Identify product categories
Apply correct tax rates
Generate trade statistics
Detect classification fraud

Finding Correct HS Codes

Pakistan Customs website
FBR HS code lookup tool
Trade associations for your industry
Professional customs agents

Invoice Layout Best Practices

Header Section

Top of invoice should include:

Company logo (optional but professional)
Business name and contact details
Invoice number and date prominently displayed
FIN and QR code

Body Section

Clear table format for line items
Readable font size (minimum 10pt)
Distinct columns with headers
Subtotals and totals clearly separated

Footer Section

Payment terms and methods
Bank account details (if applicable)
Notes or special instructions
Verification instructions for QR code

Digital Format Specifications

For Electronic Submission

Data Format: JSON or XML as per FBR API specs
Encoding: UTF-8
Date Format: ISO 8601 (YYYY-MM-DD)
Decimal Precision: 2 decimal places for amounts

For Printed/PDF Invoices

Paper Size: A4 recommended
Resolution: 300 DPI minimum for QR codes
Format: PDF/A for archival purposes

Common Format Mistakes to Avoid

Mistake 1: Missing HS Codes

Every product line must have a valid HS code. Missing codes may cause rejection.

Mistake 2: Incorrect NTN Format

NTN must be exactly 7 digits without dashes or spaces.

Mistake 3: Ambiguous Descriptions

"Item 1" or "Misc goods" are not acceptable. Use clear, specific descriptions.

Mistake 4: Math Errors

Totals must exactly match sum of line items. Use software that calculates automatically.

How Digital Invoices Ensures Compliance

Digital Invoices automatically generates perfectly formatted FBR invoices:

Auto-Formatting: All required fields properly arranged
HS Code Database: Built-in lookup for common products
Calculation Engine: Automatic, error-free tax calculations
QR Generation: Perfect codes every time
Validation: Checks all requirements before submission

Conclusion

Proper FBR invoice format is non-negotiable for compliance. While the requirements may seem detailed, using FBR-integrated software like Digital Invoices handles all formatting automatically, ensuring every invoice meets FBR specifications.