Singapore Invoicing & Tax Compliance Portal
Comprehensive statutory guidance, invoicing requirements, and freelance profession templates verified against official Inland Revenue Authority of Singapore standards.
At a Glance: Invoicing in Singapore
Mandatory Fields on Singapore Invoices
Under official guidance from Inland Revenue Authority of Singapore, all valid invoices issued by registered businesses must include the following statutory disclosures:
- invoiceNumber: Required under national tax legislation.
- issueDate: Required under national tax legislation.
- sellerName: Required under national tax legislation.
- sellerAddress: Required under national tax legislation.
- sellerTaxId: Required under national tax legislation.
- buyerName: Required under national tax legislation.
- buyerAddress: Required under national tax legislation.
- itemDescription: Required under national tax legislation.
- itemQuantity: Required under national tax legislation.
- itemPrice: Required under national tax legislation.
- taxRate: Required under national tax legislation.
- taxAmount: Required under national tax legislation.
- totalAmount: Required under national tax legislation.
Invoice Numbering & Payment Rules
Numbering Sequence: Must utilize an unbroken sequential identification number derived from an orderly serial register.
Payment Terms: Standard commercial credit terms are typically 30 days.
Statutory Record Keeping: Commercial records and tax invoices must be retained for at least 5 years from the end of the relevant tax period for audit purposes.
Profession Templates for Singapore
Select your field to generate prefilled invoices configured for SGD and GST:
Singapore Bookkeeper Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Bookkeeper Template →Singapore Caterer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Caterer Template →Singapore Cleaner Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Cleaner Template →Singapore Consultant Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Consultant Template →Singapore Building Contractor Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Building Contractor Template →Singapore Event Planner Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Event Planner Template →Singapore Executive Coach Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Executive Coach Template →Singapore Graphic Designer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Graphic Designer Template →Singapore Interior Designer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Interior Designer Template →Singapore Landscaper Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Landscaper Template →Singapore Digital Marketer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Digital Marketer Template →Singapore Musician Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Musician Template →Singapore Personal Trainer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Personal Trainer Template →Singapore Pet Caregiver Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Pet Caregiver Template →Singapore Photographer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Photographer Template →Singapore Tradesperson Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Tradesperson Template →Singapore Translator Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Translator Template →Singapore Tutor Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Tutor Template →Singapore Videographer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Videographer Template →Singapore Virtual Assistant Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Virtual Assistant Template →Singapore Web Developer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Web Developer Template →Singapore Writer Invoice
Prefilled with realistic line items, rates, and statutory tax calculations.
Open Writer Template →Frequently Asked Questions About Singapore Invoicing
What is the statutory invoice record retention period in Singapore?
Under official regulations enforced by Inland Revenue Authority of Singapore, all business invoices, receipts, and accounting records must be archived for at least 5 years from the filing date.
Are digital PDF invoices officially recognized for audit compliance in Singapore?
Yes. Inland Revenue Authority of Singapore recognizes electronically generated PDF invoices as valid accounting source documents, with freelancer acceptance officially classified as "yes".
What are the invoice sequential numbering rules in Singapore?
Must utilize an unbroken sequential identification number derived from an orderly serial register. Gaps or arbitrary resets in your invoice serial numbers can trigger administrative audit queries.
What is the statutory tax registration threshold in Singapore?
Taxable turnover exceeds S$1 million at the end of any calendar year or is reasonably expected to exceed S$1 million in the next 12 months.
What are the commercial payment terms and late interest rates in Singapore?
Standard commercial payment agreements default to Net 30 days. Late fees can be agreed in commercial contracts.
What is the current B2B electronic invoicing mandate status in Singapore?
B2B e-invoicing is currently classified as "phasing-in". For independent freelancers and sole traders, standard digital PDF documents remain fully compliant.
Official Sourcing & Citations
- IRAS: Invoicing Customers and Tax Invoice Rules — Inland Revenue Authority of Singapore (Accessed: 2026-11-01)
General information, not tax or legal advice. Verify requirements with the relevant tax authority or a qualified professional.