An appraisal, not the purchase price alone, is usually what drives your lender's loan-to-value calculation. Here's how a USPAP-compliant aircraft appraisal actually works, and why it belongs early in your financing timeline, not near the end.
General educational information about appraisal methodology and industry standards, not appraisal, legal, or financial advice specific to any transaction.
Your lender isn’t buying the aircraft, but it is lending against it.
An aircraft appraisal establishes an independent, professional opinion of what the aircraft is actually worth, separate from the negotiated purchase price. Lenders rely on it to set loan-to-value, the ratio between the loan amount and the aircraft's appraised worth, because the aircraft is the collateral behind the loan. A purchase price and an appraised value can differ, sometimes meaningfully, and when they do, the appraisal, not the purchase agreement, generally drives the lending decision.
This matters most on turbine, jet, and higher-value piston transactions, where the dollar amounts involved make an independent valuation worth the cost, and where financing terms are most sensitive to how the collateral is actually valued.
The standard the industry actually uses
USPAP, and why it matters who does your appraisal.
Reputable aircraft appraisals are prepared under USPAP, the Uniform Standards of Professional Appraisal Practice, the governing standard for the appraisal profession broadly, not just aviation. USPAP requires the appraiser to be independent, with no personal financial interest in the transaction or its outcome, and requires the appraisal fee to be set independently of the concluded value, so the appraiser has no incentive to lean the number in any direction.
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Look for the ASA credential. Accredited Senior Appraiser, a designation awarded by the American Society of Appraisers, is a recognized mark of a qualified appraiser, alongside real aviation sales or valuation experience specifically. General appraisal credentials without aviation-specific experience are a weaker fit for this asset class.
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A USPAP appraisal typically does not include a physical inspection. This surprises buyers, but it's standard: the appraisal is a valuation opinion based on documented condition, records, and market comparables, not a hands-on mechanical evaluation. It is not a substitute for a pre-buy inspection by an A&P mechanic; see our pre-buy inspection guide for that separate, and equally necessary, step.
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Standard assumptions apply unless stated otherwise. A USPAP appraisal generally assumes an airworthy aircraft, complete logbooks, compliance with applicable airworthiness directives and service bulletins, and mid-life or half-life status for major components unless the report specifically says otherwise. If any of those assumptions don't hold for the actual aircraft, the appraised value may not either.
How the number is actually reached
Three approaches exist. One does almost all the work.
Approach
How it works
How often it's used for a used aircraft
Sales comparison (market approach)
Compares recent closed sales and current offerings of similar aircraft, then adjusts for differences in age, avionics and equipment, condition, engine and airframe time, maintenance program enrollment, interior, and connectivity
The standard method, used in almost every case
Cost approach
Estimates what it would cost to reproduce the asset today, less depreciation and obsolescence
Rarely applicable; mainly used for new aircraft or unique, one-of-a-kind assets where depreciation can't be reliably measured against a used market
Income approach
Values an asset based on the income stream it independently generates
Almost never used for an individually owned aircraft, since a personal or corporate aircraft isn't usually an income-producing asset in its own right
In practice, an appraiser using the sales comparison approach identifies several truly comparable sales or listings, adjusts each one for how it differs from the subject aircraft, assigns each comparable a weight based on how closely it matches, and sums the weighted values to reach a single concluded number. Enrollment in a maintenance program (arrangements like JSSI, MSP, ESP, TAP, or CorporateCare are common examples across different manufacturers) is one of the adjustment factors that can move the value meaningfully, since it removes uncertainty about a major future maintenance cost.
Not every transaction gets a full appraisal
Below roughly $1 million, lenders often lean on a desktop valuation instead.
A full USPAP appraisal takes time and costs real money, and on a smaller piston or entry-level aircraft, that cost can be disproportionate to the loan itself. Below roughly the $1 million mark, many lenders (ours included, depending on the file) will size the loan against a desktop valuation rather than ordering a full field appraisal. The threshold isn't a hard rule; it moves with the lender, the aircraft type, and how comfortably the number supports the requested loan amount.
A desktop valuation pulls from one of a handful of subscription-based aircraft pricing guides used industry-wide by lenders, dealers, and insurers, the aviation equivalent of a blue-book value for cars. These guides publish base, average, and retail figures by make, model, model year, engine and airframe time, and common avionics or equipment packages, built from aggregated transaction and listing data rather than a physical inspection of your specific aircraft. Pulling a number takes minutes, not weeks, and costs a small fraction of a full appraisal fee.
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It's faster and cheaper, by design. A desktop pull is appropriate for smaller, well-established, high-volume aircraft types where the guide data is deep and the loan size doesn't justify a full appraisal fee.
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It's less precise than a full appraisal. A guide value reflects the broad market for that make and model; it doesn't account for your specific aircraft's damage history, logbook quality, unusual modifications, or condition the way an appraiser's own inspection and comparable-sales analysis does.
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Lenders reserve the right to require a full appraisal anyway. If the desktop value and the negotiated purchase price diverge meaningfully, if the aircraft carries unusual equipment or damage history, or if the loan size or borrower profile calls for more scrutiny, expect the lender to order a full USPAP appraisal regardless of price point.
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A desktop valuation still isn't a substitute for a pre-buy inspection. The valuation-versus-condition distinction covered below applies at every price point; a guide value tells you what similar aircraft are worth, not what shape this specific airplane is actually in.
Ask your lender directly which approach applies to your specific transaction and price point before you assume either way.
What "market value" actually means
A specific, defined term, not a loose estimate.
A USPAP appraisal's concluded value generally follows a formal definition of market value, one version of which comes from federal banking regulation (12 CFR Section 34.42(g)): the most probable price a property should bring in a competitive and open market, under conditions requisite to a fair sale, with the buyer and seller each acting prudently and knowledgeably, and the price unaffected by undue stimulus. Embedded in that definition are several real conditions: both parties are typically motivated, not under duress; both are well informed or well advised; a reasonable time is allowed for exposure in the open market; payment is made in cash or its equivalent; and the price isn't distorted by special or creative financing or concessions.
That last piece, exposure time, is itself a formal appraisal concept: a professional opinion of how long the aircraft would realistically need to be marketed to sell at the appraised value. It's a meaningful, separate data point from the appraised value itself, especially if you're thinking about resale timing down the road.
Putting it into your financing decision
Why LTV, appraisal, and down payment all move together.
Loan-to-value is simply the loan amount divided by the aircraft's value, and most lenders use the lower of the purchase price or the appraised value to calculate it, not the purchase price alone. If the appraisal comes in below the negotiated purchase price, your effective LTV on that lower number rises unless you increase your down payment to compensate. This is exactly why the appraisal is ordered early in the financing process, not treated as a formality near closing.
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Don't assume the purchase price and the appraised value will match. Ask your lender how they'll calculate LTV if the two numbers differ, before you're deep into the transaction.
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An appraisal and a pre-buy inspection answer different questions. One tells you what the aircraft is worth; the other tells you what condition it's actually in. You typically need both, not one instead of the other.
None of this is appraisal, legal, or financial advice specific to your transaction. Engage a qualified, USPAP-compliant appraiser with real aviation experience, and talk to your lender early about how the appraisal will factor into your specific loan structure.
Frequently asked questions
Questions answered directly.
An appraisal is a valuation opinion, what the aircraft is worth, typically without a physical inspection. A pre-buy inspection is a mechanical evaluation by an A&P mechanic, what condition the aircraft is actually in. They answer different questions and most transactions need both, not one instead of the other.
Requirements vary by lender, loan size, and aircraft type, but an independent appraisal is common on turbine, jet, and higher-value piston financing specifically because loan-to-value calculations depend on an accurate, independent value opinion rather than the negotiated price alone.
Most lenders calculate loan-to-value using the lower of the purchase price or the appraised value. If the appraisal is lower, your effective LTV on that number rises unless you increase your down payment to offset the difference. Ask your lender how they'll handle this scenario before you're deep into the transaction.
Look for the ASA (Accredited Senior Appraiser) designation from the American Society of Appraisers, combined with real aviation sales or valuation experience specifically, not just a general appraisal background.
A USPAP-compliant appraisal is a valuation opinion based on documented condition, records, maintenance history, and market comparables, not a hands-on mechanical evaluation. That's a standard, accepted part of the appraisal process, and it's exactly why a separate pre-buy inspection still matters.
Exposure time is the appraiser's professional opinion of how long the aircraft would realistically need to be marketed to sell at the appraised value. It's a separate, meaningful data point from the value itself, useful for thinking about resale timing.
Because it directly reflects what similar aircraft have actually sold for or are currently offered at, adjusted for real differences like age, equipment, engine time, and maintenance program enrollment. The cost approach struggles with used-aircraft depreciation, and the income approach rarely applies since most individually owned aircraft aren't income-producing assets in their own right.
Not always. Below roughly $1 million, many lenders size the loan against a desktop valuation pulled from an industry-standard aircraft pricing guide instead of ordering a full USPAP appraisal, since the appraisal fee can be disproportionate to a smaller loan. Lenders still reserve the right to require a full appraisal if the numbers don't line up or the aircraft has unusual equipment or history, so confirm which approach applies to your specific transaction.
Amelia · FLYING Finance AI specialist
Ask Amelia directly.
Amelia
Appraisals & Loan-to-Value
"Tell me where you are in the process, shopping, under contract, or already financing, and I can walk you through how the appraisal fits into your specific timeline."
Why does my lender require an aircraft appraisal?What happens if the appraisal comes in lower than the purchase price?Is an aircraft appraisal the same as a pre-buy inspection?What is a USPAP appraisal?
Appraisals drive loan-to-value more than most buyers expect. Where are you in the buying process right now?
