Annual Inspection Cost by Aircraft Type: What to Budget for a Simple Single, Complex Single or Twin

This guide is for owners and buyers putting a number on the annual inspection. It breaks cost down by aircraft class, explains what drives the squawk bill, covers owner-assisted annuals, and ends with a monthly budget you can set aside.

What is an annual inspection, and who can sign it off?

Under 14 CFR 91.409, most general aviation aircraft may not be operated unless they've had an annual inspection within the preceding 12 calendar months. The inspection follows the scope in Part 43 Appendix D. It must be performed and approved for return to service by an A&P mechanic holding an Inspection Authorization (IA), or by an appropriately rated repair station. Aircraft that carry people for hire or are used for flight instruction for hire also need 100-hour inspections. Because the rule counts calendar months, an annual completed on June 10 is good through the end of June the following year.

What the lender and insurer expect around the annual is covered separately in annual inspections on a financed aircraft. This page is about cost.

How much does an annual inspection cost by aircraft class?

Most shops price the inspection itself as a flat rate built from the hours the job typically takes on that model, times their hourly rate. Published flat-rate sheets commonly assume roughly the hours below. Shop rates vary widely by region and shop type, so the table shows two illustrative rates. Substitute your shop's rate.

What pushes an aircraft toward the top of its range:

• Retractable gear: actuators, gear doors, switches and the emergency extension system all have to be inspected, and the aircraft goes up on jacks for a retraction test.
• Constant-speed propeller and governor, turbocharging, and pressurization or oxygen systems: more systems, more hours.
• A second engine: a twin roughly doubles the firewall-forward work.
• Recurring ADs: repetitive AD inspections add time every year, and some add a lot.
• Age and access: older airframes with many inspection panels and interior removal take longer.

What drives the squawk bill?

The flat rate buys the inspection. The findings are billed on top, and they are the part owners underestimate. The inspector must list anything that makes the aircraft unairworthy. Under 14 CFR 43.11, if the aircraft isn't approved for return to service, you receive a signed, dated list of discrepancies. Any appropriately certificated mechanic can correct them. You aren't obliged to use the inspecting shop for repairs.

Also watch the calendar items that often coincide with the annual. The ELT must be inspected within each 12 calendar months (91.207). The altimeter and static system checks required for IFR in controlled airspace (91.411) and the transponder checks (91.413) run on 24-calendar-month cycles. Doing them together saves access labor, but it makes that year's bill bigger.

How do owner-assisted annuals work?

Under 14 CFR 43.3(d), a person working under the supervision of a certificated mechanic may do maintenance that the supervisor is authorized to do. The supervisor has to observe the work closely enough to ensure it's done properly, and be readily available in person. That rule does not authorize anyone but the IA to perform the required inspection itself. In practice, owners in an owner-assisted annual typically:

• Remove and reinstall inspection panels, fairings, seats and interior pieces.
• Clean, wash and degrease so the inspector can see what they're inspecting.
• Lubricate and service under supervision.
• Handle parts runs and paperwork.

Example: if your work replaces 6 of an 18-hour flat rate at $130 an hour, you save $780. That's real money, but only if the shop actually reduces the billed hours. Agree on how the invoice will work before you start. Separately, a certificated pilot who owns or operates the aircraft may perform the preventive maintenance items listed in Part 43 Appendix A, such as oil changes, tire servicing and some minor servicing, under 43.3(g). Doing those during the year keeps them off the annual invoice.

How should you budget for the annual?

A common planning rule is inspection labor plus a squawk allowance of 1 to 1.5 times the labor in a typical year. Allow more for an older aircraft, the first annual after you buy, or an aircraft with known issues. Then divide by 12 and set it aside monthly.

Keep this fund separate from the engine reserve. An annual budget covers the recurring inspection and routine findings. It won't cover an overhaul. For engine reserves, see SMOH vs TBO explained. For a fund that handles the occasional large surprise, see planning for unexpected aircraft repairs.

Buying an aircraft? Check the date of the last annual. If it's due soon after closing, you're buying that bill. Many buyers negotiate a fresh annual as a condition of sale, or price in the cost of the first one. Your pre-buy inspection should tell you what that first annual is likely to find.

How can you reduce annual costs without cutting corners?

• Fix squawks during the year rather than saving them for the annual, when they compete for the same shop time.
• Choose a shop that knows your type. Familiarity cuts hours and catches type-specific problems early.
• Ask for a discrepancy list with estimates, and a call before any repair over an agreed amount.
• Separate "required" from "recommended". Airworthiness items must be fixed. Others can be planned.
• Supply your own records. Organized logbooks and AD status reduce research time the shop would otherwise bill.
• Schedule early in your slow season, so parts delays don't ground you in flying season.

How this guide differs from related guides

This page covers what an annual costs and how to budget for it. For what your lender and insurer require around the annual, and how to handle a big finding on a financed aircraft, see annual inspections on a financed aircraft. For total ownership costs, see the operating cost breakdown and the realistic piston aircraft budget.

Frequently asked questions