Experimental Aircraft Financing: How Lenders Underwrite a Flying E-AB

This guide is for pilots buying, or refinancing, an experimental amateur-built (E-AB) aircraft that is finished, has its airworthiness certificate and has flown off Phase I. It covers what lenders look at, where appraisals and insurance trip deals up, and what the loan costs compared with a certified airplane.

Why fewer lenders finance experimental aircraft

A certified Cessna or Piper was built to a type certificate under FAA production oversight, so two airplanes of the same model and year are broadly comparable. Two E-AB aircraft built from the same kit can differ a great deal in workmanship, engine, panel and documentation. That variability shows up in four places a lender cares about:

• Collateral value. Valuation guides cover fewer experimental types, and the value of a specific airplane depends heavily on who built it and how well. If the lender ever has to repossess and sell, the price is harder to predict.
• Resale pool. Popular designs such as the Van's RV series have active owner communities and steady demand. One-off or orphaned designs have far fewer buyers.
• Insurance. Fewer carriers write hull coverage on amateur-built aircraft, and pilot-experience requirements can be stricter. The lender's collateral is only as good as the hull policy.
• Operating limitations. Under 14 CFR 91.319, an experimental aircraft may not carry persons or property for compensation or hire. There is no rental or charter income to help service the loan, so the lender underwrites your personal income and credit alone.

An NTSB safety study published in 2012 also found amateur-built aircraft over-represented in accidents relative to their share of the fleet, including in the first flight hours after a used E-AB changed hands. Underwriters and insurers remember that, which is why transition training comes up so often in E-AB approvals.

What do lenders require to finance a completed E-AB?

Expect the usual borrower file (most aviation lenders look for a 680+ credit score, with the best pricing typically from around 720–730) plus an aircraft file that is much deeper than a certified airplane's.

For how lenders read logbooks generally, see maintenance records and loan approval.

How an experimental aircraft is appraised, and why appraisals come in low

The most common surprise for E-AB buyers and builders is an appraisal below the purchase price or below what the airplane cost to build. Builder labor has no market value to the next owner, and receipts don't prove workmanship. Appraisers work from sold prices (not asking prices) for the same design with a similar engine, propeller and panel, then adjust for:

• Design popularity and support. An RV-7 or RV-10 has many comparables; an out-of-production design may have almost none.
• Engine. A type-certificated Lycoming or Continental usually values better than an experimental engine or an automotive conversion.
• Panel. Mainstream experimental avionics that parts and shops support hold value better than obscure systems.
• Build quality and records. An inspection by a mechanic who knows the type, and a complete builder's log, move the number.
• Time in service. An airplane that has flown several years with clean condition inspections by an independent A&P is easier to value than one just out of Phase I.

Worked example (illustrative). You agree to pay $200,000 for a finished four-seat E-AB, and the lender will advance 80% of the lower of price or appraised value. If the appraisal comes back at $185,000, the loan is capped at $148,000 and your cash requirement rises from $40,000 to $52,000. Put an appraisal contingency in the purchase agreement so you can renegotiate or walk away. See how appraisals affect loan terms.

Insurance: the step that stops the most E-AB loans

Lenders require hull coverage for at least the loan amount, with the lender named as loss payee and usually a breach-of-warranty endorsement. On amateur-built aircraft the questions are whether any carrier will write the hull and on what pilot terms. Underwriters look at your total time, time in type, tailwheel or high-performance experience, and whether you'll complete transition training in that model. Some decline certain designs, experimental engines or aircraft with sparse records.

Get a written quote on the specific aircraft, by N-number, before you sign, and make the purchase agreement contingent on binding coverage. If the premium or pilot requirements are unworkable, you'll find out before you've paid for an inspection and an appraisal. The insurance requirements guide covers the standard lender clauses.

Rates, down payment and term: E-AB vs certified

Sources: FLYING Finance aircraft loan rates (updated Sept 21, 2026); AOPA Aviation Finance, piston aircraft. Starting rates are for well-qualified borrowers; many loans price higher.

Worked example: $200,000 E-AB with 20% down

Financing $160,000 after a $40,000 down payment, at the experimental starting rate and two higher rates that reflect weaker credit or a less common design:

Loan amount $160,000. Principal and interest only; excludes insurance, taxes and fees. Illustrative, not a quote.

The same $160,000 over 15 years at the certified starting rate of 7.01% would cost $1,439 a month, versus $1,509 at 7.78%. That's $70 more a month and $12,559 more interest over the life of the loan. Putting 25% down instead of 20% cuts the loan to $150,000 and the 15-year payment at 7.78% to $1,414. A larger down payment also gives you a cushion if the appraisal comes in low. Model your own numbers with the loan calculator.

Buying from the builder vs a later owner

Under 14 CFR 65.104, the repairman certificate that lets the builder sign off the condition inspection belongs only to the primary builder of that aircraft. It does not transfer with the sale. If you didn't build it, an A&P mechanic must perform and sign the condition inspection every 12 months. An Inspection Authorization isn't required, but you'll want someone who knows the design. Budget for that inspection each year and ask the seller who has been doing them.

Lenders tend to be more comfortable with an E-AB that has several years of flying and independent condition inspections behind it than with one whose only inspector has been its builder. If you're the builder refinancing your own airplane, expect the lender to want some time in service after Phase I. The kit build funding guide covers that refinance path.

Loan-file checklist for an experimental aircraft

1. Written insurance quote on this N-number, with pilot requirements you can meet.
2. Copies of the airworthiness certificate and the full operating limitations.
3. Logbook entry showing Phase I complete, and the flight-test records.
4. Most recent condition inspection entry and who signed it.
5. Builder's log, photos, and the eligibility paperwork from certification.
6. Engine and propeller logbooks, including any overhaul paperwork.
7. Current weight and balance and equipment list.
8. Pre-buy inspection report from a mechanic experienced with the design (pre-buy checklist).
9. Title and lien search results (how lien searches work).
10. Signed purchase agreement with inspection, appraisal, insurance and financing contingencies.
11. Borrower documents: two years of tax returns, recent pay stubs or business financials, and bank statements for the down payment.

Red flags that stop experimental aircraft loans

• Phase I not flown off, or no logbook entry recording its completion.
• A condition inspection that has lapsed.
• No builder's log, or records that don't match the airplane.
• Major changes after certification (a new engine or propeller, for example) with no record of the FSDO notification or additional flight testing the operating limitations require.
• Undocumented accident or damage repairs.
• A one-off or unsupported design, or an engine the insurer won't cover.
• An aircraft that will be based outside the United States. Most U.S. lenders want the airplane based here.

How this guide differs from related guides

This page covers loans on a finished, flying E-AB. If you're still building, a partial kit usually can't serve as collateral; see how to finance a kit plane build for staged budgeting, home equity and refinancing at completion. If you're new to experimental aircraft and want the basics (the 51% rule, operating limitations, buy vs build), start with the first-time experimental buyer's guide. For factory-built light-sport aircraft under the MOSAIC rules, see MOSAIC light-sport financing. For design-specific pages, see the Van's RV-10 and Kitfox buyer's guides.

Frequently asked questions