Fertilizer costs and farm margins
A fertilizer-price forecast is only the beginning of a farm-budget decision. The margin depends on the nutrient being purchased, the amount the field needs, the crop price and the timing of payment. A lower expected market price next year does not automatically make delaying every purchase the best choice.
As of November 10, 2025. The World Bank's October 2025 Commodity Markets Outlook points to pressure on fertilizer affordability. US farm budgets and credit surveys add a more local perspective. Read together, they show why an international commodity outlook needs to be translated carefully before it enters a farm plan.
Read nutrients separately
The World Bank reported substantial fertilizer-price increases through the third quarter of 2025. Its outlook anticipated a rise of more than 20% in the fertilizer price index for the year, followed by declines in 2026 and 2027. Those were forecasts issued in October, not known outcomes for the following seasons.
The report also described different conditions across products and inputs. Natural gas prices had moderated in the United States and Europe during January through September, while liquid sulphur prices had risen sharply. Urea, phosphate fertilizers and potash therefore should not be treated as one market moving mechanically with a single energy price.
For a farm, the initial task is to identify the actual purchase requirement. Separate nitrogen, phosphorus and potassium needs, then identify the products being considered and the local delivered quotations. The international index is a useful signal for reviewing those quotations, but it is not the price available at the farm gate.
A quotation should make clear what is included: delivery, application, storage, financing or other services. Align those terms before concluding that one retailer is cheaper. A lower product price can be offset by an excluded service that the farm still needs to obtain.
A tonne of product is not a tonne of nutrient
Comparing fertilizers by price per tonne alone can be misleading when their nutrient concentrations differ. First put the quotations on a consistent nutrient basis, then consider the suitability and practical costs of the products for the farm's conditions.
For illustration, a hypothetical product containing 40% of the relevant nutrient provides 400 kilograms of that nutrient in a metric tonne. At an assumed price of $400 per tonne, its product cost is $1 per kilogram of nutrient. Another hypothetical product containing 20% and priced at $250 per tonne costs $1.25 per kilogram of nutrient. These are invented values to explain the arithmetic, not market quotations or product recommendations.
The calculation is only a first comparison. It does not establish field availability, timing, losses, other nutrient value or application cost. Those require local agronomic and operational assessment. Keep the arithmetic transparent so that the agronomist and the purchasing decision-maker can examine the same assumptions.
Also check the unit system. US short tons, metric tonnes, pounds per acre and kilograms per hectare should not be mixed in a spreadsheet without explicit conversion. A convincing-looking total can still be wrong if the product quote and application plan use different units.
Put crop prices beside nutrient prices
The University of Illinois farmdoc team's August fertilizer analysis recommends considering crop and fertilizer prices together when assessing the economic nitrogen rate. It describes the use of the Maximum Return to Nitrogen approach and reports farmer purchasing practices from a fall 2024 survey. Those observations are useful US evidence, but they are not a universal application prescription.
The important economic distinction is between producing the greatest possible yield and obtaining the best expected return from an additional input. A response that adds crop value worth less than its cost does not improve the margin simply because yield is higher. The assessment must still respect the field's agronomic requirements and the uncertainty of the response.
Use locally appropriate soil tests, recommendations and field history with a qualified adviser. Do not transfer an Illinois application rate into a different climate, soil or crop system. Even within a region, an economic comparison depends on the prices and conditions entered into it.
For budgeting, show how the result changes with the expected sale price and yield. Separate the assumptions used to decide an input programme from the prices eventually realized at harvest. This makes it possible to review whether a disappointing margin came from the input decision, the market outcome or a different yield result.
A national expenditure total is not a farm's quote
USDA's July 2025 Farm Production Expenditures report estimated 2024 spending on fertilizer, lime and soil conditioners at $33.8 billion. That category includes more than fertilizer, and the report concerns historical spending. It cannot establish the current price or required expenditure for an individual crop enterprise.
The report's coverage note also matters: its national series included Alaska and Hawaii in 2024, unlike the preceding years shown in the table. Readers should preserve that qualification when comparing totals. A table is only as useful as the definitions that accompany it.
At farm level, distinguish a price change from a change in quantity, crop area or product mix. If the fertilizer bill rises, ask which component changed. A larger bill could result from a higher unit price, more acres, a different nutrient programme or a combination. Each has a different implication for the following budget.
The same logic applies when comparing neighboring farms. Differences in soil condition, rotation, services purchased and accounting treatment can make a simple cost-per-acre ranking misleading. Use comparisons to ask questions, while keeping the farm's own requirements and records central.
Working capital changes the purchasing choice
The Kansas City Federal Reserve's August agricultural credit survey reported weaker farm finances and rising loan demand in its Tenth District. Conditions were more difficult in areas dependent on crop revenue, while strong cattle prices supported some parts of the region. This is lender-survey evidence from a defined region, not a national census of farm profits.
For an individual business, that context makes payment timing worth examining. An early purchase may secure a price but use cash months before the crop generates receipts. A deferred purchase may preserve cash while leaving the price and availability unresolved. Compare the financing requirement alongside the quoted price.
As an illustrative calculation, borrowing $30,000 for six months at a simple annual rate of 8% adds $1,200 before fees. The assumed rate is not a lending offer. The example shows the scale of the timing cost that should be included when comparing payment arrangements.
Separate a genuine price commitment from a deposit or expression of interest. Confirm the product, quantity, delivery period and treatment of changes before counting the purchase as secured in the budget. Any associated commercial terms deserve the same attention as the advertised price.
Build a margin range, not a single optimistic total
The August release of the 2026 Illinois Crop Budgets used projected prices and trend yields to examine regional corn and soybean returns. It expected continued pressure on average returns for cash-rented rotations. Those were model budgets with stated assumptions, including land and support-payment assumptions, rather than predictions for every Illinois farm.
Their useful lesson is to assemble the whole enterprise budget. Fertilizer is one important component, but changing it cannot be assessed independently of expected crop revenue, land cost, other inputs and financing. Identify which costs the farm can change and which are already committed.
Prepare a base case and alternatives with weaker revenue or higher costs. Keep any expected support payment separate from the crop's operating result so the source of the margin remains clear. Update local quotations as decisions approach, while retaining the earlier assumptions for comparison.
The October outlook offers a reason to watch fertilizer markets closely. It does not remove the need for field-specific nutrient planning or a realistic cash calendar. A useful purchasing decision connects the right product, the justified rate, the local price and the farm's ability to carry the cost until revenue arrives.
Source: World Bank, Commodity Markets Outlook October 2025 · Cover: AI-generated illustration