Century Egg: Buying It Well, Buying It Cheap
A batch cooked once and divided across four portions
The delivery order replaced by a wok and a pot of stock
A wok on a burner, a board of chopped scallion and a rice cooker on warm.
Century egg is priced by the ingredient, the batch and the hour, and the batch is what makes it cheap.
Prices for century egg arrive in ranges rather than headlines, and the ranges are what a household can plan with.
The price of century egg splits into ingredients and labour, and a household supplies the second one.
Where the money goes
The bill for century egg is a table rather than a number: 5 lines, and only one of them is quoted on a website.
The key ingredient sets the floor of the price, and the rest of the dish is cheap by comparison.
A restaurant charges for the rent, the labour and the washing-up, and none of them are in the ingredients for century egg.
Treat every figure as a typical range, because the same line is a different number in the next city and the next season.
The ingredient is the line that moves in the dish, and the restaurant's rent is the line that does not.
The wok for the dish needs a burner that reaches wok heat, and an induction hob does not.
| Line | Typical range | Basis |
|---|---|---|
| Wok or steamer | $25–80 | one purchase |
| Restaurant plate | $10–25 | typical |
| Key ingredient | $3–8 | per pack |
| Takeout version | $12–30 | typical |
| Ingredients, per serving | $2–5 | market prices |
Two lines, added up
Take two lines of the dish: ingredients, per serving at $2–5 and key ingredient at $3–8. Together they run $5–13 before anything optional.
The total moves with the city and the season, and the two lines that move most are the two in the sum.
A budget built on two lines is more honest than one built on a headline, and easier to check.
The cheap version of the dish costs less per plate and more per hour, and the hour is the trade.
Add the third line, takeout version at $12–30, and the minimum rises to $17–43 before anything optional.
| Line | Typical range |
|---|---|
| Ingredients, per serving | $2–5 |
| Key ingredient | $3–8 |
| Minimum total | $5–13 |
Cheap against convenient
A household does not buy the dish in isolation, it buys it instead of something else.
The table lists the substitutes, and the cheapest substitute is usually the one that costs an hour rather than a fee.
A household that can name the substitute can usually name the saving, and the saving is the gap between the two lines.
A dish cooked in a batch is cheap for two days and tiring by the third.
| Alternative | Typical range |
|---|---|
| A restaurant dinner | $25–60 |
| A delivery order | $12–30 |
| A frozen version | $5–12 |
The practical version
The order matters less than the first move, which is to know which line is fixed and which is optional.
Make stock from the bones. Bones, ginger and water, boiled down and frozen in cups.
Cut everything before the pan is hot. The dish cooks in minutes, and there is no time to chop once it starts.
Cook one extra portion. The second portion is tomorrow's lunch at the same cost.
Cook the rice before the wok. The cooker works while the pan is busy, and the meal lands together.
Buy the vegetables twice a week. A wet market is a short walk, and fresh is a frequency rather than a store.
Salt at the end. The sauce reduces, and the salt added early reduces with it.
What the dish saves is the labour charge, and the labour is the hour at the board.
The fair caveat
A fair account of the dish has to include the parts that do not work.
A wok burner runs hot, and a kitchen with one window holds the smoke, and the smoke is the cost of the dish.
A dish that needs a wok needs a burner that reaches wok heat, and an induction hob does not.
A restaurant version uses more oil and more salt, and the homemade version is cheaper partly because it uses less.
Rice left warm is a food-safety risk, and a household should cool it quickly and refrigerate it.
A household of one cooks a batch and eats it three times, and the third time is the limit.
The ingredients for the dish are cheap at a market and expensive at a convenience store, and the shop is the price.
A cheap cut of meat for the dish costs more time, and the time is the line a recipe leaves out.
A restaurant version of the dish uses more oil and salt, and the homemade version is cheaper partly because it uses less.
What the calendar changes
Timing changes the number more than bargaining does.
A batch cooked on Sunday covers two weekdays, and the weekdays are where the takeaway budget goes.
The ingredients for the dish are cheapest in the season they are grown, and the frozen version is the off-season answer.
A batch of the dish cooked on Sunday covers two weekdays, and the weekdays are where the takeaway budget goes.
A household that plans by the season pays the ordinary price, and the ordinary price is the one the table describes.
Before you pay
Before paying for the dish, five checks change the total more than any discount.
Keep the receipt for the big shop. A receipt for the the dish shopping shows which line moved and by how much.
Taste before the salt. The sauce for the dish reduces, and the salt added early reduces with it.
Cool the rice quickly. Rice for the dish left warm is a food-safety risk rather than a shortcut.
Use the whole vegetable. Stems and peel for the dish go into the pot, and the bin stays empty.
Buy the ingredient in season. The main ingredient for the dish is cheapest when it is grown, and the frozen version covers the rest.
Price the batch, not the plate. One shopping trip for the dish divides across four portions, and the portion is the real cost.
A household that runs the five checks once runs them on the next purchase without thinking.
Which household is this for?
The cost falls on the person who books it, and the benefit falls on everyone at the table.
A single person can absorb a bad buy, and a family cannot, which is why the family reads the table first.
The table does not change with the household, but the number of lines a household uses does.
The person who cooks the dish is often not the person who shops for it.
What's worth taking?
A household that freezes half the batch of the dish buys a weeknight for the price of a container.
Related reading, on the same kind of arithmetic: Dumpling, Chinese Cuisine and Chinese Ingredients.
The search for the dish ends with a number, and the number is easier to check than to argue about.
A household that writes the range down before it shops is already ahead of the one that guesses.
A restaurant charges for the table and the washing-up, and neither is in the ingredients for the dish.
The household that cooks the dish in a batch pays the ingredient price and not the restaurant one.
The ingredients for the dish are cheaper at a market than at a convenience store, and the shop is the price.
A batch of the dish divides the shopping across four portions, and the division is the saving.
Sources
- Household final consumption expenditure per capita — World Bank Open Data · accessed 2026-10-19
- Urban population (% of total population) — World Bank Open Data · accessed 2026-10-19