How to Calculate Your Corn Breakeven (Step by Step)
Your corn breakeven is the price per bushel you need to cover every dollar it costs to grow the crop. To find it, add up all your costs per acre — seed, fertilizer, chemicals, fuel, machinery, land, labor, insurance, and interest — then divide that total by your expected yield per acre. The result is your breakeven price. If the cash price is above it, you're making money. If it's below, you're selling at a loss.
That's the short version. Below is how to actually work it out for your operation, why the number matters more than most farmers realize, and the costs people most often leave out.
Why your breakeven price is the most important number on your farm
Every marketing decision you make comes back to one question: is this price above or below my cost of production? Without that number, you're guessing. With it, you can weigh your marketing decision against a real number — and walk into the elevator or the bank with a figure instead of a hunch.
A lot of farmers carry a rough breakeven in their head, but the in-the-head version almost always runs low, because it leaves out the costs that don't show up as a check written at planting — depreciation, your own labor, the interest on operating money, the opportunity cost of owned land. Those are real costs, and leaving them out is how an operation can look profitable on paper while net worth quietly slides.
The corn breakeven formula
The math itself is simple:
Breakeven price per bushel = Total cost per acre ÷ Expected yield per acre
The work is in getting the two inputs right. A rushed total cost or an optimistic yield will hand you a breakeven that feels good and isn't true. Take the time on both.
Step 1: Add up your costs per acre
Group your costs so nothing slips through. Most operations think in terms of two buckets.
Variable costs change with how much you plant — the costs you'd avoid if you didn't put the crop in:
Seed
Fertilizer (N, P, K, lime amortized)
Chemicals (herbicide, insecticide, fungicide)
Fuel and oil
Crop insurance premiums
Drying and handling
Hauling
Repairs on equipment used for the crop
Operating interest (the cost of the money you borrow to plant)
Fixed costs are there whether you plant or not, and these are the ones most breakevens miss:
Land — cash rent if rented, or your mortgage/payment if you're buying it; for paid-off ground, count its opportunity cost (what you'd earn renting it out)
Machinery depreciation
Property taxes and insurance
Your own labor and management (pay yourself — your time has value)
Interest on term debt tied to the operation
Add every line, per acre, for one acre of corn. That total is your cost of production per acre.
Step 2: Use a realistic yield
Divide by the yield you actually expect — not your best year, not the county average, not the number that makes the breakeven look comfortable. A practical approach is your proven average (similar to your APH for crop insurance), maybe trimmed slightly if you want a conservative number to market against. Be honest here: every bushel you optimistically add lowers your breakeven on paper and sets you up to sell too cheap in real life.
Step 3: Do the division
Divide total cost per acre by expected yield per acre.
Example: if your full cost of production comes to $780 per acre and you expect 215 bushels per acre, your breakeven is $780 ÷ 215 = $3.63 per bushel. Any cash price above $3.63 is profit; anything below is a loss you're absorbing.
The costs farmers most often forget
If your breakeven feels suspiciously low, it's almost always because one of these got left out:
Your own labor. If you didn't pay yourself, you didn't count your single biggest input.
Land opportunity cost on owned ground. Owned land isn't free — it could be earning rent. Counting it at zero understates your true cost.
Machinery depreciation. That combine wears out a little every pass. Spreading its cost across the acres it covers is a real expense, even in a year you don't write a check for it.
Operating interest. The money you borrow in spring and pay back in fall costs you. At today's rates, that's not a rounding error.
Leaving these out is the difference between a feel-good number and a number you can actually market and borrow against.
Stress-test it against a bad year
A single breakeven number assumes everything goes to plan. It rarely does. The more useful exercise is to ask: what happens to my breakeven if my yield drops 15%? Because your costs are mostly fixed, a yield drop raises your per-bushel breakeven fast — the same $780 in costs spread over 183 bushels instead of 215 pushes your breakeven from $3.63 to $4.26. Knowing that ahead of time tells you how much cushion you really have before a tough year turns into a losing one.
Let the spreadsheet do the math
Working this out by hand once is worth doing — it teaches you where your money goes. But doing it every year, for every field, while testing different yields and prices, is exactly the kind of repetitive math a spreadsheet should handle.
The Grain Marketing Breakeven Tracker from Farm Wife Financials does all of this for you. You plug in your costs and expected yield, and it calculates your breakeven price per bushel automatically — then stress-tests it against yield drops so you can see where you stand in a good year and a bad one. It organizes your full cost of production into clear direct and overhead categories — seed, fertilizer, chemicals, crop insurance, drying, hauling, machinery, land, labor, interest, and more — so nothing gets left out, and it shows the price you need to break even and the price you need to hit your profit goal.
No subscription, no software to learn — just an Excel file you buy once and own forever. Built by a financial analyst who grew up on a farm and still raises cattle and row crops in Iowa, so it's made for how farms operate.
See the Grain Marketing Breakeven Tracker →
Farm Wife Financials provides spreadsheet tools for informational and educational purposes only. This article is general information, not financial, tax, or marketing advice. Your operation's numbers are your own — verify your inputs and consult a qualified professional before making marketing or business decisions.