Egg Cost and ROI Calculator: the complete guide
Backyard eggs are rarely cheaper than the store once you count the coop, but the payback math is more interesting than most people expect. This calculator works out your true cost per dozen and how long the setup takes to pay for itself.
How the egg cost and roi calculator works
- Running cost is feed plus bedding plus any recurring supplies, spread across the eggs the flock actually lays.
- Egg output comes from bird count, laying rate and seasonal drop off.
- Setup cost (coop, run, feeders, birds) is amortised so you can see a payback period against store egg prices.
- Comparing to store prices uses the price you personally pay, which matters a lot when comparing to pasture raised organic rather than the cheapest carton.
How to use it
- Enter flock size and average eggs per hen per week.
- Enter monthly feed and bedding spend.
- Enter your one time setup cost and the local store price per dozen.
- Read cost per dozen, monthly savings or loss, and payback in months.
Step by step examples
Six hens, $22 per month feed
Six hens laying 5 eggs a week produce about 10 dozen per month. At $25 total running cost that is $2.50 per dozen, cheaper than most pasture raised cartons.
$1,200 coop build
If the same flock saves $30 per month against store prices, the coop pays back in about 40 months. A cheaper build or a bigger flock shortens that sharply.
Recommended values
| Item | Value | Notes |
|---|---|---|
| Feed cost per hen per month | $4 to $7 | |
| Eggs per good layer per week | 4 to 6 | |
| Annual laying decline | 15 to 20 percent per year | |
| Typical DIY coop for 6 hens | $400 to $1,500 |
Common mistakes
- Leaving the coop build out of the math and then being surprised by the real number.
- Assuming peak laying all year. Winter and molt can cut output in half.
- Comparing to the cheapest store eggs rather than the eggs you would actually buy.
- Ignoring the value of manure, pest control and not buying eggs during a shortage.
Frequently asked questions
Is it cheaper to raise your own chickens for eggs?
Running costs usually beat premium store eggs at about $2 to $3.50 per dozen. Once the coop build is included, payback often takes two to four years.
How many eggs will a hen lay per year?
A good production breed lays 250 to 320 eggs in the first year, dropping 15 to 20 percent each year after.
What is the biggest hidden cost?
The coop itself, followed by predator proofing repairs and winter water heating.
Related calculators
What next?
Free tools that pair well with this calculator.