💵 Short Answer
Over US$5,000 in foreign currency, or over 15 million VND, and you must declare it on the way out. But declaring is not enough on its own — above those amounts you also need a certificate from a licensed bank, and the airport is not where you get one.

The cash thresholds for entering Vietnam are well covered. The thresholds for leaving are the same numbers, which is why most guides stop there and move on.

They should not. On the way out there is a second requirement that does not exist on the way in, and it is the kind that cannot be fixed at the counter.

The Thresholds

What you are carryingDeclare above
Foreign currency, cashUS$5,000 or equivalent
Vietnamese dong, cash15,000,000 VND
Gold300g

The currency thresholds come from the State Bank’s Circular 15/2011/TT-NHNN, and they apply per person crossing an international checkpoint — in either direction.

✅ What does not count towards the threshold Traveller’s cheques, bank cards, savings books, securities and other payment instruments are outside these limits. The rule is about physical cash. Money on a card is not money in your pocket as far as this regulation is concerned.

The Part That Catches People: The Bank Certificate

On arrival, exceeding the threshold means filling in a customs declaration. That is the whole obligation.

On departure, exceeding the threshold means presenting one of two documents at the checkpoint:

  • A certificate authorising the export of cash foreign currency or Vietnamese dong, issued by a licensed credit institution — in practice, a commercial bank; or
  • A written approval from the State Bank of Vietnam.
🚫 You cannot obtain this at the airport It is issued by a bank, during banking hours, at a branch. There is no counter airside that produces one, and there is no form at customs that substitutes for it. Travellers who discover the requirement at the checkpoint have run out of options — the money cannot simply be declared and waved through.

Licensed banks are obliged to issue this certificate to individuals carrying cash abroad for travel purposes. The practical point is that you have to ask, in advance, at the bank — ideally the same bank where you changed or withdrew the money, since they can see the source.

The Leftover Dong Problem

This is where the rule bites hardest, and it is almost never the situation people expect.

Fifteen million dong sounds like a lot until you convert it. It is a fairly ordinary amount to be holding at the end of a trip if you changed money generously at the start, paid for most things by card, and never got round to changing the rest back. Plenty of travellers also take dong home deliberately — the 500,000 note is a popular souvenir, and families sometimes keep a stack for children.

Count what is actually in your wallet before you get to the airport Nobody thinks of leftover holiday money as something requiring a bank letter. If you are anywhere near 15 million dong, either change it back before you leave, spend it, or get the certificate while banks are still open.

Changing it back is usually the easier answer. Vietnamese dong is difficult to exchange outside Vietnam and typically at a poor rate, so carrying a large amount home rarely makes financial sense in the first place.

Flying out of Vietnam?

Departure is three separate queues, not one. All three lanes handled for $45 per person.

See Departure Fast Track →

Gold Counts Too — Including What You Are Wearing

The gold threshold is 300 grams, and the part people miss is that jewellery being worn is not automatically excluded. A heavy gold chain bought in Vietnam is gold leaving Vietnam.

The gold declaration rule in detail →

What To Do, In Order

Before your last banking day

Count your cash honestly

Foreign currency and dong separately. Include what is in a money belt, a hotel safe, and anyone else’s bag that is really yours. The threshold is per person, so a couple carrying a shared pile should be clear about whose it is.

If you are over

Decide: change it, spend it, or get the certificate

For leftover dong, changing back is usually simplest. For foreign currency you genuinely need to carry, go to a licensed bank and ask for the export certificate. Allow a working day.

At the airport

Declare at customs, with the certificate in hand

The declaration is made at the customs desk in the departures area. Have the bank certificate with the cash it refers to — not in the checked bag.

Common Questions

Up to US$5,000 in foreign currency, or up to 15 million Vietnamese dong, per person. Above either figure you must declare at customs, and you must also present a certificate issued by a licensed bank authorising the export of the cash, or a written approval from the State Bank of Vietnam.

Yes, up to 15 million dong without formality. Above that you need the bank certificate. Bear in mind that dong is hard to exchange outside Vietnam and usually at a poor rate, so changing it back before you fly is generally the better option unless you are keeping notes as souvenirs.

From a licensed credit institution — a commercial bank — at a branch, during banking hours. Licensed banks are required to issue it to individuals carrying cash abroad. It is not available at the airport, and customs cannot issue a substitute, so it has to be arranged before your last banking day.

No. The thresholds apply to physical cash. Traveller’s cheques, bank cards, savings books, securities and similar payment instruments fall outside them, which is the straightforward way to move larger sums without paperwork.

Per person crossing the checkpoint. A family of four each carrying their own money each has their own threshold. What does not work is one person carrying the whole family’s cash and treating it as four allowances.

Thresholds and the export certificate requirement are set by Circular 15/2011/TT-NHNN of the State Bank of Vietnam, current as of September 2026. Individual banks set their own process and timing for issuing the certificate — ask at the branch rather than assuming it is same-day.