Owning a machine starts to pay when it covers enough area each year that its fixed cost per hectare falls below the contract rate, after you add what a late contractor costs in yield. Using 2025 University of Illinois cost estimates and 2024 Iowa custom rates, these machinery cost benchmarks come out at about 1,400 ha (3,400 ac) a year for a new 470-hp combine, 630 ha (1,540 ac) for a new 16-row planter, and 630 hours a year for a 205-hp tractor.
Most comparisons leave out one line: timeliness. They treat a hired hectare and an owned hectare as equal, which is false when the contractor arrives after the best planting or harvest date. For planting, the cost of a late arrival can cut the breakeven area by more than 40%, a larger change than moving interest rates from 3% to 7%. The threshold depends less on the machine's price than on how sensitive its job is to the calendar.
What does it cost to own a machine for one year?
Ownership cost is what you lose each year whether the machine works 50 hours or 500: depreciation, interest, insurance and housing. Operating cost (fuel, lubrication, repairs and labour) rises with use.
Iowa State University's own-or-hire worksheet (Edwards, revised 2015) turns depreciation and interest into one annual capital recovery charge. Take the purchase price minus the expected resale value, multiply by a capital recovery factor for your interest rate and ownership period, then add interest on the resale value. Insurance and housing add about 1% of the purchase price a year. ASABE tables give resale values: a combine used 300 hours a year keeps about 23% of its list price after 10 years.
Use a real interest rate, which is the loan or equity rate minus expected inflation. In the third quarter of 2026, US banks charged an average of 7.06% on farm machinery loans, according to a University of Illinois analysis of Federal Reserve survey data, 2.49 percentage points above 2020. With inflation near 2%, the real rate is close to 5%.
How do you calculate the breakeven area?
The breakeven area is the annual ownership cost divided by what each hectare of your own work saves compared with hiring:
Breakeven area = annual ownership cost ÷ (contract rate − your operating cost per hectare)
The contract rate includes the contractor's fuel, labour and repairs, so subtract your own. For a rented tractor, use hours and the hourly rate.
Use a local benchmark for the contract rate. The 2024 Iowa custom rate survey reported average charges of USD 44.05 per acre (USD 109/ha) for combining maize, USD 24.20 per acre (USD 60/ha) for planting, and USD 0.32 per horsepower per hour for a rented tractor without fuel or operator. The 2026 edition reported increases in every category.
A 2017 Purdue University analysis applied the same formula to a self-propelled sprayer. On a 1,210 ha (3,000 ac) farm that sprays every field twice, the breakeven for sprayer ownership was 1,781 ha (4,402 ac) sprayed per year, below the 2,428 ha the farm sprayed.
Breakeven benchmarks for tractors, combines and planters
The table uses list prices from the 2025 Illinois machinery cost estimates, a purchase price of 85% of list, 10 years of ownership and ASABE resale values. Hire rates are the 2024 Iowa averages. The last column adds a yield penalty to each hired hectare, explained in the next section.
| Machine (new) | List price (USD) | Hire benchmark | Breakeven at 3% real interest | At 5% | At 7% | At 5%, with late-hire penalty |
|---|---|---|---|---|---|---|
| Tractor, 205 hp (153 kW) | 415,030 | USD 66 per hour rented | 540 h/yr | 630 h/yr | 730 h/yr | 630 h/yr (no penalty for tillage) |
| Combine, 470 hp, 12-row maize head and 10.7 m platform | 1,037,300 | USD 107/ha | 1,210 ha (2,980 ac) | 1,380 ha (3,410 ac) | 1,560 ha (3,850 ac) | 1,090 ha (2,700 ac) |
| Planter, 16-row | 274,743 | USD 62/ha | 530 ha (1,300 ac) | 630 ha (1,540 ac) | 730 ha (1,800 ac) | 350 ha (870 ac) |
Ontario's agriculture ministry, in a 2026 update, finds that a combine costing 910,000 Canadian dollars breaks even with custom hire at about 1,130 ha (2,800 ac) a year.
A 205-hp tractor needs about 630 hours a year to beat renting, while the Illinois estimates assume 300 hours. On paper, many farms should rent, but rental tractors are scarce in peak weeks, so plan labour bottlenecks and machine capacity together.
Worked example: a 900 ha maize and soybean farm
A farm harvests 900 ha (2,220 ac) a year, 60% of it maize. At 5% real interest, a new combine with heads costs about USD 100,800 a year to own, or USD 112/ha. With USD 34/ha in operating cost, the total is USD 146/ha. The contractor charges USD 107/ha, so owning costs about USD 35,000 a year more.
Now add timeliness. If a late contractor costs 1% of an 11 t/ha maize crop at USD 175/t, each hired hectare carries a hidden USD 19. Hiring then costs USD 126/ha, and owning is still about USD 18,000 a year more expensive. The farm should keep hiring, or share a combine so the machine covers at least 1,100 ha a year.
The cost of a contractor who arrives late
FAO's 2011 guide Hire services by farmers puts the yield penalty for late planting at up to 1% per day of delay. Trials summarised by Nebraska CropWatch in 2019 found maize losses below about 63 kg/ha (1 bu/ac) per day for 20 days after the optimum in Illinois, and an optimum window of 22 April to 10 May in Iowa.
The table assumes a 3-day planting delay at 0.5% a day and a harvest delay costing 1% of yield, on 11 t/ha of maize at USD 175/t. That adds USD 29 to each hired planting hectare and USD 19 to each harvested one. The planter breakeven falls from 630 to 350 ha, and the combine breakeven from 1,380 to 1,090 ha. Primary tillage can usually wait a week with little yield effect, so the tractor threshold does not change.
Machinery sharing has the same weakness. A study of six Swedish arable farms found that pooling their machines cut total costs by about 15% and investment by about half, but timeliness costs ranged from EUR 10 to EUR 120/ha between years (De Toro and Hansson, Biosystems Engineering, 2004). Members of farmer cooperatives can share a planter only if they agree on a field order before the season.
How interest rates and used-machine prices move the threshold
Interest is the second-largest ownership cost after depreciation, so the threshold follows the rate. Moving the real rate from 3% to 7% raises the combine breakeven by 29% and the planter breakeven by 38%. A 2016 CIMMYT study in Bihar, India, found the same effect at small scale: a zero-tillage drill with a 50% purchase subsidy broke even at 22.3 ha a year with a 10% discount rate, and at 17.8 ha with 4%.
Used-machine prices act through resale value. If resale values end 25% below the ASABE averages, the combine breakeven rises by 4% and the planter breakeven by 9%. Buying used lowers ownership cost but raises repairs, so your own farm records of hours and repairs are a better guide than any table.
Why smallholders hire first and wait for service
On small farms, the question is whether the hired service arrives in time. In Bihar, only 8.3% of 1,000 surveyed households owned a four-wheel tractor, and zero-tillage service providers needed 22.3 ha a year to break even, or 44.6 ha without the subsidy (Keil and colleagues, Food Security, 2016). With a sowing window of 1 to 15 November, one drill can cover at most about 48 ha.
In Ghana, a 2018 IFPRI field study found that tractor owners avoid scattered plots because travel and turning raise their cost per hectare, so smallholders who book alone wait longest. A 2017 IFPRI brief notes that a two-week planting delay in northern Ghana can reduce yields by 30 to 55%, many times the cost of the hire fee.
The answer is to aggregate demand: groups that book one provider for adjacent fields on agreed dates get earlier service. Valora Earth records field operations, dates and costs by field, which gives you the hours, hectares and delay data this calculation needs.
Frequently asked questions
How many hectares do I need to justify buying a combine?
With 2025 US prices and a 5% real interest rate, a new 470-hp combine with heads needs about 1,380 ha (3,400 ac) a year to cost less than a contractor charging USD 107/ha. If late contractors cost you yield, the threshold falls to about 1,100 ha. A used or shared combine lowers it further.
Is renting a tractor cheaper than owning one?
At USD 0.32 per horsepower per hour, renting a 205-hp tractor costs less than owning a new one below about 630 hours of use a year. Many farms use a tractor of this size for about 300 hours. The limit is availability: rental tractors are scarce in peak weeks, so check supply in those weeks first.
Which operation should I stop contracting first?
Start with the operation where delay costs the most yield, which is usually planting, then harvest. Tillage, spreading and transport can often move by several days with little loss, so they are the cheapest to keep contracting. Compare your own cost per hectare with the local rate plus your expected loss from late service.
