How to Calculate Value Added
Value added equals a firm's sales value minus the cost of the intermediate goods it bought, and adding value added across firms gives GDP.
The Value Added formula
Calculator
Enter each firm's sale price along the chain to get value added at every stage and the total that GDP counts.
What the first firm buys from outside the chain. The example assumes nothing, so all of its sale is value added.
Stage one: the raw material sale to the miller.
Stage two. The wheat is the miller's intermediate good.
Stage three. The flour is the baker's intermediate good.
Stage four: the final sale to the shopper.
The four stages sum to $3, matching the final sale price once outside inputs are taken out. This is what GDP counts.
- Farmer's value added
- $0.5
- Miller's value added
- $0.7
- Baker's value added
- $0.8
- Grocer's value added
- $1
- Sum of every sale
- $6.7
- Double counting avoided
- $3.7
Sale price minus anything bought from other firms.
The miller sells for $1.2 and paid $0.5 for wheat, so $0.7 is new value.
The baker's sale price minus what the flour cost.
The final sale price minus what the bread cost at wholesale.
Adding all four sales gives $6.7, far more than the bread is worth, because the wheat is counted again inside the flour and again inside the bread.
Using value added instead of total sales keeps $3.7 of intermediate goods out of GDP.
How to calculate Value Added, step by step
- 1Take the firm's sales value. The price it charges times the quantity it sells at its own stage of production.
- 2Subtract intermediate purchases. Take out what the firm paid other firms for goods it used up or resold this year.
- 3Repeat for each stage. Do the same for every firm in the chain, from raw material through to the final sale.
- 4Add the stages together. The sum of value added equals the price of the final good, which is what GDP counts.
Worked example: Value Added
A farmer sells wheat to a miller for $0.50, adding $0.50 of value. The miller sells flour to a baker for $1.20, adding 1.20 − 0.50 = $0.70. The baker sells bread to a grocer for $2.00, adding 2.00 − 1.20 = $0.80. The grocer sells it to a shopper for $3.00, adding 3.00 − 2.00 = $1.00. Total value added = 0.50 + 0.70 + 0.80 + 1.00 = $3.00, exactly the final price, while adding up every sale would double count to $6.70.
Value Added questions
Why does the value-added method avoid double counting?
Each firm subtracts what it bought from other firms, so the wheat inside the flour and the bread is never counted twice. The stages sum to the final price.
Is value added the same as profit?
No, value added still has to cover wages, rent, interest, and taxes. Profit is only what remains after those payments.
What counts as an intermediate good?
Anything a firm buys from another firm to use up or resell in this year's production, such as flour bought by a baker. Machinery is capital, so it counts as investment instead.
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