Here is a worked simple day for one person: 60,000 VND for breakfast, 80,000 for lunch, 160,000 for dinner and 50,000 for coffee, water or another drink. Total: 350,000 VND. These amounts are chosen planning allowances, not newly quoted prices at a named stall. They show where the money goes and what has to change if you want a large seafood dinner or several cocktails as well.
A mixed day can allocate 90,000 VND to breakfast with coffee, 150,000 to lunch, 350,000 to dinner and 60,000 to other drinks: 650,000 VND per person. The purpose is not to spend exactly each line. It is to avoid using the breakfast allowance to judge a long seaside dinner, then being surprised when a whole day costs more than the one number saved from an old travel article.
Both examples cover food and the stated drinks only. Add transport, attraction tickets and any celebration extras separately. If breakfast is already included in your room, remove that line once; do not budget it again as though every hotel morning were an extra purchase. If you plan to skip the included buffet for a market breakfast, that is a new choice with its own cost, even though the hotel breakfast remains available.
A useful food budget starts with a rhythm: a bowl for breakfast, a rice meal when you are in town and one dinner shared slowly. You do not have to make all three meals the expensive event. Nor does an affordable meal need to be presented as second best. Give the day a centre, then spend on the food and setting that make that particular meal worthwhile.
For two adults using the simple-day example, the allowance is 700,000 VND for the day; for four, it is 1,400,000 VND before any adjustment for shared dishes. That multiplication is a starting budget, not a requirement to order four copies of every dish. A shared rice meal may use the money differently from four individual bowls. Children also need their actual portions or the buffet’s stated category, rather than being priced by an arbitrary half of the adult plan.