Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Your annual cost
$8,633
Your fixed cost share
$5,333
Your variable (usage) cost
$3,300
Your effective cost per hour
$143.89
Savings per hour vs sole ownership
$0.00
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter number of partners.
- 2Enter total annual fixed costs ($).
- 3Enter variable cost per hour (fuel + reserves) ($/hr).
- 4Enter your hours flown per year.
- 5Enter total hours flown by all partners.
- 6Read your your annual cost on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
A well-structured partnership can cut per-hour ownership cost by more than half compared to sole ownership, but only if the cost split matches how the airplane is actually used. This calculator splits fixed costs (hangar, insurance, loan, annual) evenly across partners since those exist regardless of who flies more, then allocates variable costs (fuel, maintenance reserve) by each partner's actual hours, producing a fair total and per-hour cost for each partner rather than a flat equal split that penalizes low-hour partners.
Worked example
Using the values the calculator loads with:
Inputs
- Number of partners: 3
- Total annual fixed costs: 16000 $
- Variable cost per hour (fuel + reserves): 55 $/hr
- Your hours flown per year: 60
- Total hours flown by all partners: 180
Results
- Your annual cost: $8,633
- Your fixed cost share: $5,333
- Your variable (usage) cost: $3,300
- Your effective cost per hour: $143.89
- Savings per hour vs sole ownership: $0.00
What each field means
Inputs
- Number of partners
- The number of partners used in the calculation. Starts at 3 so you have a working example on load. Accepted range: 2–10.
- Total annual fixed costs ($)
- The total annual fixed costs used in the calculation, measured in $. Starts at 16000 $ so you have a working example on load.
- Variable cost per hour (fuel + reserves) ($/hr)
- The variable cost per hour (fuel + reserves) used in the calculation, measured in $/hr. Starts at 55 $/hr so you have a working example on load.
- Your hours flown per year
- The your hours flown per year used in the calculation. Starts at 60 so you have a working example on load.
- Total hours flown by all partners
- The total hours flown by all partners used in the calculation. Starts at 180 so you have a working example on load.
Results
- Your annual cost
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Your fixed cost share
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Your variable (usage) cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Your effective cost per hour
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Savings per hour vs sole ownership
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Is an even fixed-cost split always fair?
It's fair when partners have roughly similar usage and similar say in scheduling priority. If one partner flies far more than others, some partnerships weight part of the fixed cost by hours too, or require the high-usage partner to buy a larger ownership share up front, so a pure even split isn't universal — read your partnership agreement's cost formula carefully.
What costs go in the fixed pool versus variable pool?
Fixed: hangar or tie-down rent, insurance premium, loan payment, annual inspection base cost, state registration. Variable: fuel, oil, and reserve funds for engine overhaul and routine maintenance that scale with hours flown. Some partnerships also fund a shared reserve account per hour flown to prevent a scramble when a big bill (like an engine overhaul) comes due.
How many partners is optimal?
Three to four is the most common sweet spot — enough to meaningfully cut fixed cost per partner without creating scheduling conflicts that limit each partner to too few available days. Beyond five or six partners, scheduling friction and disagreements over maintenance decisions tend to outweigh the additional cost savings.
What happens to the ongoing cost split if a partner leaves?
Most partnership agreements require the buyout of an exiting partner's equity share at appraised value, and the remaining partners then either absorb the higher per-person fixed share or recruit a replacement partner. Building an exit clause into the agreement before it's needed avoids disputes later.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
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Hangar vs Tiedown Cost Calculator
Compare monthly hangar rent against tiedown fees plus weather-related wear costs.
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Aircraft Partnership Cost Share Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/aircraft-partnership-cost-share
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/aircraft-partnership-cost-share" target="_blank" rel="noopener">Aircraft Partnership Cost Share Calculator — RevenueLab</a> (2026).</p>
Source: [Aircraft Partnership Cost Share Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/aircraft-partnership-cost-share) (2026).