Exchange vs Outright Part Calculator
Compare exchange (fee + core charge exposure) against outright purchase (price minus core resale) for rotables — the AOG counter decision.
Rotable purchasing has two paths — exchange with core return, or outright with core resale — and the cheaper one flips with core condition and time pressure.
Read the core-return terms before choosing: condition standards, return deadline (often 14–30 days), and what 'BER' (beyond economical repair) does to your credit.
With your numbers: Exchange: 2,800 fee with 4,500 core exposure at 100% expected credit = 2,800. Outright: 7,400 less 1,500 core value = 5,900. Difference: 3,100.
⚠️ Not for operational decisions. This is a record-keeping and planning aid only — not certified avionics, not a source of regulatory truth. Always verify against official sources (FAA) and your operator's approved documents before flying.
Free exchange-vs-outright calculator for aircraft rotables: true cost of each path including core charge exposure and core resale value — decided with arithmetic during the AOG call, not after the invoice.
About Exchange vs Outright Part Calculator
The parts counter offers two prices for most rotables: an exchange (lower fee, but a core charge held against your returned unit meeting condition standards by a deadline) and outright (higher price, your core stays yours to overhaul, keep as spare, or sell). The cheaper path is not constant — it flips on the honest answer to one question: what is your core actually worth, and will it pass the exchange vendor's condition standards? A cracked core that gets billed full core charge converts a cheap exchange into the expensive path retroactively. This calculator runs both columns with your numbers, including the expected core-credit percentage that experienced buyers haggle over, and returns the difference. Two minutes of arithmetic during the AOG call routinely saves four figures — and always beats finding out via the core-charge invoice.
How to use Exchange vs Outright Part Calculator
- 1Get both quotes: exchange fee + core charge, and outright price.
- 2Estimate your core's expected credit honestly (condition, deadline risk).
- 3Read the difference; choose the cheaper TOTAL path, then diarise the core return.
Why use Exchange vs Outright Part Calculator?
- ✓Both purchase paths costed side by side with one input set
- ✓Core-credit percentage models the real risk: condition standards and deadlines
- ✓Core resale value captures what outright buyers usually forget they own
- ✓Built for the time-pressured AOG phone call
- ✓Instant, free, browser-only
Frequently asked questions
What is a core charge and when do I lose it?+
A deposit (often near the outright price) held against returning your removed unit as an acceptable rebuildable core. You lose part or all of it when the core misses the return deadline (commonly 14–30 days), fails condition standards (cracked cases, missing subcomponents, corrosion), or is ruled BER. Each vendor's standards differ — reading them BEFORE choosing the exchange path is precisely the input this calculator's core-credit percentage represents.
When does outright purchase beat the exchange?+
Three recurring cases: your core has real independent value (overhaulable for your own spare shelf, or saleable into a strong market); your core is damaged enough that the exchange credit is doubtful, removing the exchange path's advantage; or you're building spares depth and the rotable itself is the inventory. Fleet operators also buy outright to escape perpetual core-deadline administration across dozens of transactions.
Can the core-return deadline really bite that hard?+
Routinely: the removed unit sits behind the hangar while everyone fights the install, the 21-day window closes, and the full core charge bills — often doubling the transaction. Mitigations are administrative: photograph the core at removal, ship it the same week, track the deadline like the maintenance due-date it is. The calculator's expected-credit field is where you price your own organisation's honesty about this.
Where is this data stored?+
Everything you enter is saved in your browser's local storage on your own device — nothing is uploaded to any server. Your records stay completely private, work offline, and load instantly. Use the CSV export regularly to keep an off-device backup copy.
How do I back up or print these records?+
Use the Export CSV button below the table: it downloads your full purchase comparison as a spreadsheet-ready file. From there you can print a clean copy, archive it with your records folder, or import it into any other system. Exporting monthly is a good habit since the working data lives only in your browser.
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