Invoicing Vietnamese Clients: VAT, Hóa Đơn Đỏ and Tax Codes

If a Vietnamese client asks you for an invoice and you hand them a Word document, you'll get a polite phone call from their accountant. Vietnamese B2B clients need hóa đơn đỏ — official electronic invoices issued through a tax-authority-approved system. Personal informal invoices have no value to them.

Hóa đơn đỏ — what it is

"Red invoice" (named for the old red paper version) is the official VAT-eligible invoice that allows the buyer to deduct input VAT and book the expense for corporate tax. Since July 2022, all such invoices are electronic (hóa đơn điện tử), issued through MISA, VNPT, Viettel, FPT or BKAV platforms and validated against the tax authority's system.

To issue one you need:

1. A Vietnamese tax code (TIN) — either personal MST or company MST
2. A registered e-invoice service
3. A digital signature USB token

You cannot issue a hóa đơn đỏ as a tourist or on any non-Vietnamese-employment visa class without first registering for one of the vehicles below. You can issue an informal receipt but it has no tax value.

Personal tax code as freelancer

Individuals can register a personal tax code (mã số thuế cá nhân) at the local tax department. This lets you:

• Declare income personally (PIT)
• Issue invoices in limited circumstances (typically through a "household business" — hộ kinh doanh cá thể — registration)

A hộ kinh doanh is the simplest legal vehicle for a Vietnamese-resident freelancer who wants to invoice Vietnamese clients. It comes with:

• Flat-rate or revenue-based tax (1.5–7% depending on activity)
• License to issue e-invoices
• Annual business licence fee 300,000–1,000,000 VND

Foreigners can register a hộ kinh doanh only if they have a TRC. Foreigners on e-visa or non-TRC long-stay status cannot.

Company invoicing

Once you have a Vietnamese LLC (see starting a company) the invoicing flow is:

1. Issue e-invoice via MISA Meinvoice / VNPT / Viettel
2. Sign with digital signature
3. Send PDF + XML to client
4. Tax authority syncs automatically
5. Declare in monthly/quarterly VAT return

VAT rates:

Export services (e.g. you invoice a foreign client) are 0% rated but require contracts and bank-receipt evidence to qualify.

Practical workflow with MISA

MISA Meinvoice (most common):

1. Subscribe a bundle (e.g. 1,000 invoices for ~2m VND, ~3 years validity)
2. Plug in digital-signature USB token
3. Create invoice with buyer's MST, name, address, line items, VAT
4. Sign and send to tax authority via API
5. Email PDF + XML to buyer

Total time per invoice: 2–3 minutes once set up.

What if the client doesn't insist?

Some small Vietnamese clients (especially individuals, not companies) don't care about hóa đơn đỏ. They'll pay you on a Word invoice into your VCB account. That income is still your taxable income. You file it via personal PIT annually. The catch is that without a hóa đơn the client can't expense it, so most B2B clients won't accept this.

Cross-border edge cases

You're a US-based contractor invoicing a Vietnamese company. They:

• Withhold Foreign Contractor Tax (FCT) — 5% VAT + 5% CIT typically on services
• Remit net amount to you
• File the FCT return

This means you're effectively taxed at source. If your country has a tax treaty with Vietnam (US doesn't yet have a ratified one; UK does), you can sometimes reclaim or net off.

Honest take

If you have any Vietnamese revenue and plan to keep getting it, register a hộ kinh doanh (if you have TRC) or an LLC. The informal invoice route works for one-off jobs but kills your B2B prospects. Vietnamese accounting is by-the-book; clients won't bend their compliance for you.

Related

• Freelancing and invoicing from Vietnam
• Starting a company in Vietnam
• Payroll and social insurance
• Vietnam tax residency

Summary

Invoicing Vietnamese clients legally requires understanding hóa đơn đỏ (official e-invoices), VAT compliance, and tax registration. Freelancers and companies need a personal or corporate tax code (MST) and must use government-approved e-invoicing platforms (MISA, VNPT, Viettel, FPT, BKAV). Informal invoices have no tax value; Vietnamese B2B clients require official invoices for expense deduction and tax compliance.

Process at a glance

1. Determine your legal vehicle: Hộ kinh doanh (household business, TRC required) or LLC (for companies or non-TRC holders)
2. Register tax code: Obtain personal MST (hộ kinh doanh) or company MST (LLC) at local tax authority
3. Subscribe to e-invoice platform: Choose MISA Meinvoice, VNPT, Viettel, FPT, or BKAV; purchase invoice bundle (~2m VND for 1,000 invoices)
4. Obtain digital signature: Register USB token (chữ ký số) with tax authority
5. Issue invoice: Create, sign with USB token, send to tax authority, email PDF + XML to client
6. Declare monthly/quarterly: File VAT return if VAT-registered; file annual PIT if freelancer

Cost breakdown

Costs scale with business volume and whether you hire an accountant. Solo freelancers can DIY for minimal expense; companies typically pay monthly accounting fees (3–8m VND / month) to manage compliance.

Common pitfalls

• Informal invoices won't deduct VAT for the buyer. Even if the client agrees to a Word document, they cannot claim input VAT or book it as a tax-deductible expense, so most B2B clients refuse.
• TRC is mandatory for foreigners in hộ kinh doanh. Tourists and e-visa holders cannot register; you must have a Temporary Residence Card (TRC) or form an LLC instead.
• Missing digital signature invalidates the invoice. E-invoices must be signed with a government-approved digital-signature USB token; unsigned e-invoices are rejected by the tax system.
• Export services (0% VAT) require full documentation. Invoicing a foreign client at 0% VAT demands a signed service contract, bank proof, and residency evidence; the tax authority audits these claims.
• VAT registration ties you to monthly or quarterly returns. Once VAT-registered, you must file returns regularly even if zero-rated; late filings carry penalties.

Official resources

• General Department of Taxation (Vietnam) — Personal and corporate tax codes, VAT regulations, e-invoice specifications
• Ministry of Finance E-Invoice Portal — Official e-invoice law, approved service provider list, and compliance requirements
• Vietnam Online Tax System — Personal income tax filing and annual declaration portal

Verify before acting. Rules change. Confirm with a qualified Vietnamese adviser before relying on any specific detail.