Every extra month a listing sits has a price. Most sellers hold out for a number that costs more to reach than it is worth. This works out what waiting actually costs.
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Method. Carry = monthly fixed costs × (days ÷ 30.44). Depreciation = ask × annual rate × (days ÷ 365), straight-line. Cost of capital = ask × annual rate × (days ÷ 365), applied to the full asset value as the opportunity cost of capital held in the aircraft. Maintenance is entered whole if the event falls inside the window.
Not modelled. Market movement, currency, tax position, or the chance that waiting genuinely finds a better buyer. It answers one question only: what does holding cost. Set depreciation to zero if you believe your model is holding value, and the calculator will still show you the carry and capital drag.
Benchmark. Average days on market reached 98 on a trailing-twelve-month basis through April 2026, up 11.3% year over year. Source: JETNET iQ Market Monitor, WINGX Research.