Piper PA-31 Navajo Cost of Ownership for Private and Business Owners
This page budgets the short-body PA-31 and PA-31-310 Navajo for the person who owns it and flies it: a business owner, a family moving six or seven people, or a pilot stepping up from a light twin. It focuses on what private operation costs, the turbocharger and exhaust items that surprise new owners, and what insurers and the FAA require of the pilot.
Which Navajo is this budget for?
The PA-31 Navajo entered production in 1967 with two turbocharged 310 hp Lycoming TIO-540-A engines, a 6,500 lb maximum takeoff weight, seating for the pilot plus five to seven passengers and about 190 gallons of fuel. The Navajo B (1971) moved to TIO-540-E engines of the same power and added options such as air conditioning and a pilot door. The PA-31-325 Navajo C/R (1974–1975) used 325 hp counter-rotating engines derived from the Chieftain's. A rare non-turbo PA-31-300 was built in 1968–1969 (14 aircraft).
Two relatives have their own economics. The stretched PA-31-350 Chieftain (350 hp, up to ten seats, often with commuter or charter history) is covered on the Navajo Chieftain cost of ownership page. The pressurized PA-31P (425 hp geared TIGO-541 engines, 1970–1977) adds pressurization maintenance and is outside this budget. Typical asking prices for the PA-31 family in our aircraft database run from about $80,000 to $210,000; treat that as a starting point and verify with Vref or Aircraft Bluebook. Specs are on the PA-31 Navajo model page.
What does a PA-31 Navajo cost per flight hour?
| Item | Per hour | Basis |
|---|---|---|
| Fuel: 34 gal/hr × $7.24 100LL | $246 | Both engines, typical owner cruise power; your settings govern it |
| Oil and consumables | $5 | Planning allowance |
| Engine overhaul reserve: 2 × $60,000 ÷ 1,800 hr | $67 | Assumed overhaul incl. accessories and R&R; get quotes |
| Turbocharger and exhaust parts reserve | $12 | Turbos, wastegates, slip joints, clamps, tailpipes |
| Propeller reserve (two props) | $8 | Planning allowance |
| Unscheduled maintenance reserve | $65 | Gear, brakes, heater, avionics, oxygen |
| Total variable cost | $403 | Before fixed costs and loan |
The fuel figure assumes owner-style cruise power; lean-of-peak operation is not appropriate for every turbocharged installation, so follow the POH and Lycoming guidance for your engines. Each $0.50 change in the price of 100LL moves the hourly cost by $17.
Turbocharger and exhaust items owners should budget for
The turbo system is where a Navajo's maintenance differs most from a normally aspirated twin. Hot exhaust under pressure is a fire risk, which is why the FAA keeps the system on a short inspection leash. AD 2013-10-04, effective July 17, 2013, requires visual inspections of listed exhaust components on the PA-31, PA-31-325 and PA-31-350 for bulges, cracks and exhaust leak stains, repeated at intervals not to exceed 60 hours time in service or 6 months, whichever comes first. The pressurized PA-31P has a similar repetitive requirement under AD 2014-23-03.
| Item | When | Budget note |
|---|---|---|
| Exhaust AD 2013-10-04 inspection | Every 60 hours TIS or 6 months, whichever first | Labor each time; parts if cracks, bulges or leak stains are found |
| Turbocharger overhaul or exchange | On condition, often near engine overhaul | Quote per unit; SI 1009 notes turbos may need removal before engine overhaul |
| Wastegate, controller and oil lines | On condition | Leaks and sticking controllers show up as overboost or slow spool-up |
| Exhaust slip joints, V-band clamps, tailpipes | On condition, found at AD inspections | The most frequent turbo-system parts bill |
| Combustion heater | Per the heater manufacturer and any applicable AD | Shares the fire-risk logic of the exhaust system |
The six-month clock matters for low-time owners: even at 50 hours a year you still pay for two exhaust inspections. Some early TIO-540-A engines are limited to a lower TBO unless specific modifications were done, per the notes to Lycoming SI 1009, so check the engine serial numbers and logbooks before you price the reserve. Engine and turbo work on a Navajo belongs with a shop that sees PA-31s regularly.
Fixed costs and the owner's annual budget
| Item | Per year | Basis |
|---|---|---|
| Insurance (hull and liability, owner-flown) | $11,000 | Planning assumption, not a quote |
| Hangar | $9,000 | Varies widely by airport |
| Annual inspection (baseline, before squawks) | $7,500 | Planning assumption |
| Databases, subscriptions, oxygen service, misc. | $3,000 | Planning allowance |
| Total fixed (before loan) | $30,500 | Plus exhaust AD inspections |
| Hours/yr | Exhaust AD checks | Operating cost | Per hour | With loan ($16,096/yr) | Per hour incl. loan |
|---|---|---|---|---|---|
| 50 | 2 ($600) | $51,241 | $1,025 | $67,337 | $1,347 |
| 100 | 2 ($600) | $71,383 | $714 | $87,478 | $875 |
| 200 | 4 ($1,200) | $112,265 | $561 | $128,361 | $642 |
Exhaust inspections are priced at an assumed $300 each. Figures exclude sales or use tax, property tax and depreciation. At 50 hours a year, Lycoming's 12-year calendar recommendation, not hours, may decide when the engines are overhauled.
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Insurance and pilot requirements
The FAA minimums for flying a PA-31 as pilot in command are straightforward:
- Multiengine land class rating on a private or commercial certificate.
- High-performance endorsement (14 CFR 61.31(f)), because each engine produces more than 200 hp.
- Complex endorsement (61.31(e)) for retractable gear, flaps and controllable-pitch propellers.
- High-altitude endorsement (61.31(g)) if you move to a pressurized PA-31P whose service ceiling or maximum operating altitude, whichever is lower, exceeds 25,000 ft MSL.
- Supplemental oxygen under 91.211: crew above 12,500 ft cabin altitude for more than 30 minutes, crew at all times above 14,000 ft, and oxygen provided to every occupant above 15,000 ft.
Insurers are the tougher gate. For a cabin-class turbo twin they commonly look for meaningful multi-engine time, time in type or a formal initial course in type, and annual recurrent training; a pilot new to multi-engine flying may be quoted with a mentor-pilot requirement or not at all. The $11,000 insurance line above is a labeled planning assumption for an experienced multi-engine pilot, not market data. Ask for quotes on the specific airplane before you sign a purchase agreement. The market has helped: Gallagher reported GA hull and liability rates softening through Q1 2026, and BWI called pricing for experienced piston owners generally stable in May 2026. Lender requirements are in aircraft loan insurance requirements, and coverage choices above the minimum are in aircraft insurance cost in 2026.
Financing a PA-31 for private or business use
As of September 2026, piston aircraft loan rates quoted by major aviation lenders generally start around 7% for well-qualified borrowers and run to roughly 10%. AOPA's guidance for twins is 15–30% down and maximum terms of 10–15 years, and its lenders prefer multi-engine aircraft built in 1970 or later. That puts 1967–1969 Navajos in exception territory; 1970-and-later airframes are the easier loan. Most lenders look for a credit score of 680+, with the best pricing typically starting around 720–730+.
Example: a $190,000 PA-31 (an illustration, not a valuation) with 25% down leaves a $142,500 loan. At 7.75% that is $1,710 a month over 10 years or $1,341 over 15 years.
| Term | 7.75% APR | 8.75% APR | 9.75% APR |
|---|---|---|---|
| 10 years (120 mo) | $1,710/mo $62,718 interest | $1,786/mo $71,809 interest | $1,863/mo $81,117 interest |
| 12 years (144 mo) | $1,523/mo $76,816 interest | $1,602/mo $88,144 interest | $1,682/mo $99,776 interest |
| 15 years (180 mo) | $1,341/mo $98,937 interest | $1,424/mo $113,859 interest | $1,510/mo $129,227 interest |
Loan amount $142,500. Principal and interest only; excludes insurance, taxes and fees. Illustrative, not a quote.
Business use. Aircraft are listed property, so depreciation (including 100% bonus depreciation for eligible aircraft acquired after January 19, 2025, and Section 179, capped at $2,560,000 for tax years beginning in 2026) depends on more than 50% qualified business use. Business aircraft flown under Part 91 are generally 5-year MACRS property, and use by 5% owners or related persons has special rules. See business use of an aircraft for tax and aircraft depreciation after the 2025 tax law, and confirm with a CPA. If a company will own the airplane, read owning an aircraft in an LLC before you close.
Owner checklist before you commit to a Navajo
- Engine and turbo times, serial numbers and TBO eligibility under Lycoming SI 1009 for both engines.
- Exhaust AD compliance history: dates, hours and any parts replaced at each 60-hour or 6-month inspection.
- Structural AD status by serial number (owner-group lists for the PA-31 include lower spar splice plate and tail spar items).
- Combustion heater and oxygen system condition, since both are costly to catch up.
- An insurance quote in your name, with any training or mentor-pilot conditions, before you release a deposit.
- A pre-buy by a PA-31 shop; start with our pre-buy inspection checklist.
How this page differs from related pages
This page owns the owner-flown PA-31 and PA-31-310 budget: turbo and exhaust upkeep, insurance and pilot requirements, and business use. The stretched Chieftain and its charter and utility economics are on the Navajo Chieftain (PA-31-350) cost of ownership page. Specs and generated payment examples are on the model page. If you are moving up from a smaller twin, compare the Piper Aztec and Cessna 310 budgets. Other models are on the cost of ownership hub, and loan terms are defined in the aircraft financing glossary.
Frequently asked questions
How much does it cost to own a Piper PA-31 Navajo per year?
With this page's planning assumptions, an owner-flown PA-31 costs about $71,383 a year at 100 hours ($714 per hour) before any loan payment, and about $87,478 with the example loan. Fuel at 34 gallons per hour is $246 of each hour at $7.24 per gallon.
What turbocharger and exhaust costs should a Navajo owner expect?
Budget for repetitive exhaust inspections under AD 2013-10-04 (every 60 hours or 6 months on the PA-31, PA-31-325 and PA-31-350), plus on-condition replacement of slip joints, clamps, tailpipes, wastegate parts and eventually turbocharger overhauls. Lycoming notes turbos may need removal before engine overhaul, so price them separately.
What ratings do I need to fly a Piper Navajo?
You need a multiengine land rating, a high-performance endorsement because each engine exceeds 200 hp (14 CFR 61.31(f)) and a complex endorsement (61.31(e)). An instrument rating is practical for the mission. The pressurized PA-31P may also require the high-altitude endorsement under 61.31(g); check its operating limits. Insurers usually add their own experience and training requirements.
Do I need oxygen in a turbocharged Navajo?
Usually, if you use the turbos. Under 14 CFR 91.211 the required crew must use oxygen above 12,500 ft cabin altitude for flight longer than 30 minutes and at all times above 14,000 ft, and every occupant must be provided oxygen above 15,000 ft. Unpressurized Navajos cruising in the high teens or low twenties need a working system for everyone aboard.
Can I finance a 1960s PA-31 Navajo?
Often, but it is harder. AOPA says its lenders prefer multi-engine aircraft built in 1970 or later, so 1967–1969 Navajos may need an exception, a larger down payment or a shorter term. Typical twin terms are 15–30% down and 10–15 years. On a $142,500 loan at 7.75%, the payment is $1,341 a month over 15 years.
Can a business deduct a Piper Navajo?
Possibly. An aircraft used more than 50% for qualified business use can qualify for depreciation, including 100% bonus depreciation for eligible aircraft acquired after January 19, 2025, and Section 179 if elected. Business aircraft flown under Part 91 are generally 5-year MACRS property. Use by 5% owners and related persons has special limits. Confirm your situation with a CPA.