Combine harvester buying guide Australia 2025: Costs, types, maintenance & compliance

What is a combine harvester, functions and types

What a combine does

A combine harvester is a self-propelled machine that integrates three sequential operations used in grain harvesting:

• Reaping (cutting), the machine cuts standing cereal crops (e.g. wheat, barley, oats)
• Threshing, separates grain from the stalks and heads
• Cleaning / winnowing, removes chaff and straw, delivering clean grain into a hopper while expelling waste
  
  

This consolidation of tasks makes combines essential for efficient harvesting, particularly in large areas.

Common types / classes of combine harvesters

Combine harvesters generally vary by size, engine power, header width and capacity. In Australia, buyers typically select based on farm size, expected hectare throughput per season, crop types, and labour availability. Recent industry data indicates that Class 8 to Class 10 combines account for approximately 88.5% of all new units sold, and 90% of value, indicating a strong market tilt towards larger high-capacity harvesters.

• Small / entry-level combines, suitable for smaller farms or lower-hectare workloads; lower capacity, simpler features, lower upfront cost.
• Mid-size combines, ideal for medium farms; balanced between cost, capacity and operational efficiency.
• Large / high-capacity combines (Class 9–10), designed for large-scale farms or contract harvesting, with wide headers, large grain tanks, powerful engines, and advanced features (e.g. GPS, yield-monitoring, telematics).
  

What you can expect to pay: Pricing guide

New machines

• New combine harvesters (depending on brand, class, capacity and specification) generally fall in the $300,000–800,000+ range.
• Variations in price reflect engine power, header width, automation and optional features (e.g. navigation, yield sensors, auto steering, larger grain tanks).
  
  

Used machines

• Used combines for sale in Australia are commonly advertised between $50,000 and $400,000, depending heavily on hours used, maintenance history and model age.
• Some low-hour older machines with basic headers might be found below $100,000; others with high hours or worn components may be in the $150,000–250,000 range.
  
  

Hidden or recurring costs

• Realistically, owning a combine isn’t just a one-off purchase. Running costs, fuel, maintenance, wear-parts, depreciation, insurance, add up quickly. Some estimates suggest that for a mid-size combine, total operational overhead (fixed and variable costs) can exceed $300 per hour under modern fuel prices and usage.
• Annual maintenance costs (engine service, belts, header maintenance, tyres, parts) for a new machine can fall between $10,000 and 25,000, with used or older units often costing more due to unscheduled repairs and parts replacements.
  

Operating, maintenance and parts considerations

Fuel and hourly operating costs

• Combine harvesters are diesel-powered and consume significant fuel, especially during heavy use. Fuel alone can represent a substantial portion of hourly operating cost.
• When calculating profitability, you need to factor in not just fuel, but also engine and gearbox wear, header wear (blades, belts), tyre wear, and potential field downtime for repairs or cleaning.
  
  

Maintenance and parts

You should budget for:

• Routine services, engine oil changes, filters, belts, gearbox, hydraulics.
• Header and threshing components, knives, belts, sieves, concaves, rotor/axle bearings: wear from abrasive crop and dust demands regular inspection and replacement.
• Tyres, tracks or undercarriage (if applicable), especially for larger combines or heavy fields.
• Wear from heavy seasons, more frequent use shortens intervals between services; plan accordingly.
  
  

Annual maintenance budgets (new units) typically span $10,000–25,000, but older combines, or those used hard across seasons, often exceed this.

Depreciation and fixed costs

• Depreciation and fixed overhead (loan repayments/interest, insurance, storage) are often independent of how many hours you actually use the machine, making it important to calculate on a per-season or per-hour basis before investing.
• If you use the combine only seasonally, lower utilisation can mean higher per-hour cost, making contract harvesting or custom-harvest services potentially more cost-effective for smaller farms.
  

Financing, leasing and depreciation strategies

Given the high upfront cost, many buyers do not pay cash. Instead, they use:

• Equipment finance or agricultural machinery loans, lenders familiar with farm equipment can provide structured repayments over several years.
• Leasing or rent-to-own, particularly suitable if you expect fluctuating seasons or want to preserve capital for other farm investments.
• Used machine purchase, reduces cash outlay substantially, though it comes with increased maintenance risk and potential shorter remaining life.
  
  

When buying, consider depreciation allowances and tax implications under Australian accounting rules. Depreciable agriculture plant may allow you to claim tax benefits, a worthwhile conversation with your accountant.

Also weigh return on investment: if your farm acreage and yield volumes justify the outlay, a new machine may pay off over several seasons; otherwise, used or contract harvesting may be more practical.

Compliance, safety and regulatory considerations in Australia

Owning and operating a combine harvester in Australia comes with safety and compliance obligations, both for operator safety and farm insurance.

Safety hazards and safe operations

Operating a combine involves multiple risks: entanglement in augers, falls during maintenance, noise, dust, fire risks, overhead power lines when unloading grain, and risk of being run over if people enter operating zones.

Safe practices include:

• Never working under an unsupported header; always use purpose-built access points for maintenance or cleaning.
• Never carrying passengers, especially on headers or in transport.
• Ensure guards are in place, engine off and ignition removed before cleaning, repairs, or checking the grain tank.
• Be mindful of overhead power lines when extending the unloading auger.
  
  

Certification, registration or insurance

While there is no centralised “harvester certification” for private farm use in many states, you must ensure:

• Safe work practices and compliance with workplace health and safety regulations (for example, if you employ workers).
• Insurance coverage, including farm machinery insurance, liability coverage for operators and workers, particularly if using the combine commercially or with hired labour.
• Compliance with noise, emissions or environmental standards, depending on location and state laws.
  
  

If you use the combine for custom harvesting services (third-party farms), ensure you meet any contractual and regulatory safety requirements, including operator competency and equipment maintenance standards.

What to check when buying, and buying checklist

Before committing to a combine harvester purchase, especially used, here’s what you should check:

• Hours of use / operating history, like tractors, combine hours give a rough sense of wear; lower hours generally better.
• Maintenance history and records, oil changes, part replacements, header repairs, typical service schedule compliance.
• Condition of wear items, header knives/blades, belts, concaves, sieves, tyres/tracks, gearbox / threshing cylinder condition.
• Engine condition and performance, start-up, idling, exhaust emissions, fuel consumption, previous repairs.
• Header and hopper functionality, header width, alignments, unloading auger functionality, grain tank condition.
  
• Spare parts availability, older models may have limited parts; ensure availability of belts, knives, sieves, bearings before buying.
• Attachments and optional extras, headers for different crops, chaser bins, grain carts, GPS/yield-monitoring, which may affect versatility and resale value.
• Safety features, guards, emergency shut-offs, access ladders, operator cabin safety, grain-unloading safety mechanisms.
• Budget for maintenance and running costs, don’t just focus on purchase price; forecast your per-season cost including fuel, parts, labour, depreciation etc.
  

Common buyer questions (and answers)

Q: Should I buy new or used?

A: It depends on your farm size, workload and budget. New machines offer latest technology, warranty, potentially lower maintenance initially but cost significantly more. Used machines reduce upfront costs, but may require higher maintenance and have shorter remaining lifespan.

Q: Is it better to buy or hire a custom-harvesting contractor instead of owning a combine?

A: For smaller farms or lower acreage, hiring a contractor can be more cost-effective: you avoid capital outlay, maintenance, depreciation and storage. But for large farms or frequent use, owning may save money long term.

Q: What is the real hourly cost of operation?

A: When factoring fuel, maintenance, depreciation, parts, insurance and other overheads: for a mid-size combine, total costs can exceed $300 per hour of operation.

Q: How often does a combine need servicing?

A: Routine engine and hydraulics maintenance may be annual; header wear, belts, knives and threshing components often need inspection after each season. More frequent servicing may be required under heavy use or tough conditions.

Q: What about resale value or depreciation?

A: Agricultural machinery tends to depreciate significantly over years, especially with heavy use. Resale value depends on hours used, maintenance history, and demand for that model. Well-maintained machines retain better value.

Final thoughts

Buying a combine harvester is a major investment, but also one of the most powerful tools your farm can wield for efficiency, yield and operational scale. By carefully evaluating your needs (acreage, crop type, workload), comparing new vs used machines, budgeting realistically for ongoing costs, and ensuring proper maintenance and compliance, you can make a decision that delivers long-term value rather than unexpected cost burdens.