Arrival and departure days both count

In plain termsFor Vietnam PIT (personal income tax) day-count, arrival day counts as a day in Vietnam. Departure day counts as a day in Vietnam. Circular 111-style counting is not “nights in a hotel” and not “24-hour blocks.” A two-hour connection that is a recorded entry still needs a sober look.

Start here — three checks

Export immigration stamps / e-exit records. Do not count from memory.
Add 1 for each arrival date and 1 for each departure date, then add the full days between
If a day has both arrival and departure (same-day in and out), still treat it as Vietnam presence unless you have a filed contrary rule — do not delete it to be clever

Decision map

Signal	Lock now	If skipped
Land Wednesday, leave next Tuesday	Count Wednesday through Tuesday inclusive.	You drop two days and think you are 10 under 183.
Midnight flight that leaves at 00:30	The calendar date of departure is a Vietnam day. Do not shift it to “already gone.”	Airline local time and immigration date disagree in your spreadsheet.
Border runs to “reset” days	Each departure and return adds days on both ends. Reset theatre often increases the count.	You spend more days travelling than you save.
Missing stamp on one exit	Use tickets plus e-exit if needed. A missing stamp is not a missing day in your favour by default.	Audit uses carrier data; your notebook used hope.
You also need the 12-month window count	Apply the same inclusive method inside that window, not only the calendar year.	Correct calendar maths, wrong rolling maths.

Common wrong movesWhere people lose time on this exact question.

Counting hotel nights only.
Dropping arrival or departure to “match other countries.”
Using Excel NETWORKDAYS and deleting weekends.

If this fails, do this nextRecovery order — not a generic legal memo.

Rebuild the day list from primary travel records.
Re-run calendar-year and 12-month tests with inclusive ends.
If you already filed with a short count, correct it; do not wait for a query.

Calendar year vs 12-month windowWhere these counted days are applied.Tax-residency proof packKeep the stamp log in the pack.Tax residency hubAbode tests that still apply after the count.

Common questions

Does the day I land in Vietnam count toward 183 days?

Yes. Arrival day is a Vietnam day for PIT residency counting. Departure day is also a Vietnam day.

Do I count nights or calendar dates?

Calendar dates of presence, inclusive of arrival and departure. Hotel nights undercount.

What if immigration stamps are messy?

Combine stamps, e-visa/exit records, and tickets. Do not pick the source that yields fewer days.