Compare the cost of reaching a meal

A cheaper basket can have a dearer journey

Two places sell ingredients for the same planned meal. One has a lower shelf price but requires a paid trip. Another costs more at the till but can be reached without an additional fare. Comparing the receipts alone may rank the options differently from comparing the journey to a prepared meal.

Define the meal, quantity, time and place before comparing costs. A comparison of four portions with one portion is not a fair price comparison. Nor does matching the number of portions prove nutritional equivalence: their ingredients, usable amounts and intended eaters still matter.

Decide which costs the question includes

A practical cash boundary may include food purchases, the extra transport charge and the fuel bought for preparation. If a trip serves several purposes, explain how its cost is allocated. Do not charge the entire trip to food in one option and only a share in another without a reason.

Time is also a resource, but it is not always paid in cash. Record preparation and travel time separately unless a stated valuation converts it to money. Existing equipment, standing energy charges and water costs may sit outside a narrow comparison. Calling them excluded is more informative than silently treating them as zero.

Follow two invented meal routes

Suppose each route produces the same four intended portions, with suitability assumed for this arithmetic only. Route A costs €3.00 for ingredients, €2.00 for extra travel and €0.80 for preparation fuel. Route B costs €4.50 for ingredients, has no extra fare and uses €0.40 of fuel. Under this cash boundary, the totals are €5.80 and €4.90.

The diagram shows the totals after adding those three components. Route B is €0.90 cheaper for this stated meal despite its higher ingredient price. Changing the transport assumption can change the result. These invented numbers do not establish real prices, nutritional adequacy or which method uses less energy.

Affordability depends on money available

A household can face a lower cost per portion and still lack the cash required for a large purchase today. Bulk buying assumes both up-front money and suitable storage. Sharing a pack changes the arrangement, but it requires coordination and an agreed allocation of costs and food.

Rent, transport to work and other needs compete for the same resources. FAO's affordability monitoring explicitly considers resources reserved for non-food needs. A household meal comparison should similarly explain what money is actually available at the relevant time, without pretending that a national average describes every household.

Use benchmarks for the questions they answer

FAO's cost-of-a-healthy-diet method defines a least-cost food-purchase benchmark using locally available foods and a reference dietary framework. It is useful for monitoring economic access. It is not an instruction to eat a particular menu or a report of a particular household's full expenditure.

A household's feasible meal additionally depends on preferences, facilities, travel and preparation. Use the benchmark and the household comparison as different views of access. State the currency, observation date and food quantity; distinguish an international comparison unit from money a person can spend at a shop.

Keep the result within its boundary

A lower cash total answers one question. It does not automatically answer whether the food is nourishing, enjoyable, safe or practical for the intended person. Prices per kilogram can also mislead when foods differ in edible yield or preparation losses; compare usable amounts when that is the question.

Record the assumptions that could reverse a decision: shared transport, changing fuel charges, unused food or a missing facility. Practical improvements may reduce travel costs, make smaller purchases available or provide suitable preparation space. Nutrient requirements and detailed process guidance belong in their primary subjects, linked to this access analysis.

Worked examples

Check your understanding

1. A calculation excludes unpaid cooking time. Does that mean the time has no value?

   Show answer and reasoning

   No.

   It lies outside the cash boundary and should be recorded separately.

2. If Route A's extra fare becomes zero, while every other assumption remains, what is its total?

   Show answer and reasoning

   €3.80.

   €3.00 + €0.80 = €3.80; the transport assumption changes the ranking.

3. Does a €1.00-per-portion price prove a suitable diet for a particular person?

   Show answer and reasoning

   No.

   Quantity, composition, needs and the wider dietary pattern require additional evidence.

Key ideas

• Add costs for a stated meal and quantity.
• Keep cash, time and excluded costs explicit.
• Use monitoring benchmarks without turning them into personal menus.