Decide the method before you need it
The single most useful thing a partnership can do about buyouts is agree the valuation method while everyone is still friendly and nobody knows who will leave first.
Once someone has announced they are going, every valuation method suddenly favours one party or the other, and choosing between methods becomes a negotiation about money rather than a procedural step. Groups that settled the method in year one execute buyouts in a fortnight. Groups that did not can take months.
Four workable methods
Independent appraisal. A qualified aircraft appraiser values the aircraft; the departing share is that value times their percentage. Most defensible, costs $500 to $1,500, and worth it on anything valuable.
Average of two appraisals. Each side commissions one, and you average them. Slower and dearer, but very hard to argue with afterwards.
Published guide value. Vref or Aircraft Bluebook, adjusted for hours, avionics and damage history. Cheap and fast. Weakness: guides handle unusual aircraft and recent upgrades poorly.
Formula from purchase price. Purchase price adjusted by an agreed annual depreciation or appreciation rate. Simplest of all, and increasingly wrong the longer it runs — piston singles have not depreciated as the formulas assumed.
For most groups, independent appraisal with a fallback to guide value if the parties agree is the right default.
The adjustments people forget
The aircraft's value is only the starting point. A correct settlement adjusts for several things, and this is where the records you have kept for years suddenly matter:
- The departing partner's share of the reserve fund. They contributed to it with every hour flown. If they leave with 600 hours to TBO and the fund holds $18,000, their share of that money is theirs. This is the most commonly overlooked item and the most commonly disputed.
- Outstanding balances. Unpaid invoices come off. Credit balances go on.
- Prepaid costs. Insurance and hangar paid annually in advance should be prorated to the exit date.
- Known upcoming liabilities. If the annual is due next month and expected to be expensive, is the departing partner contributing? Answer this in the agreement, because both positions are arguable.
- Recent capital improvements. A new avionics stack fitted six months ago that the departing partner paid a third of should be reflected in the appraised value — check that it is, because appraisals sometimes lag upgrades.
Worked example
Three equal partners in a Cherokee 180. One leaves.
- Appraised value: $88,000 → one-third share = $29,333
- Share of reserve fund ($16,500 ÷ 3) = +$5,500
- Prepaid insurance, 7 months remaining ($2,400 × 7/12 ÷ 3) = +$467
- Outstanding invoices = −$820
- Settlement: $34,480
Note how large the non-aircraft items are — over $5,100, nearly 15% of the total. A group that settles on the aircraft value alone has short-changed the departing partner by that amount, and if they notice later, the goodwill is gone.
Who buys, and how it is paid
Right of first refusal to existing partners, at the appraised value, within a defined window — 30 or 60 days is typical. If they decline or cannot fund it, the departing partner may sell to an outside buyer, usually subject to the remaining partners approving the new person. That approval right matters: you are choosing a co-owner, not just a source of funds.
Payment terms deserve as much thought as price. Few partners can produce $34,000 at short notice. Common structures: a lump sum within 60 days; instalments over 12 to 24 months with interest; or the aircraft is sold and proceeds distributed if nobody can buy. Write down which applies, and what happens if the remaining partners default on instalments.
The records that make this easy
Everything above depends on being able to answer, precisely: what has this partner contributed, what have they used, and what is in the fund?
Groups with clean monthly statements and a reserve ledger answer that in an afternoon. Groups with a spreadsheet that has been edited in place for six years cannot answer it at all, and end up negotiating from memory — which is to say, negotiating from two incompatible memories.
This is the moment years of dull bookkeeping either pays off or does not. It is also, not coincidentally, the moment people wish they had kept proper books.
Do it in writing
A short settlement agreement recording the valuation, the adjustments, the payment terms and a mutual release. It protects both sides, and it prevents the conversation eighteen months later that begins "I've been thinking about that reserve fund."