Cash contribution is the cash a unit of inventory will bring in from today forward, minus the cash it will cost to sell it from today forward, ignoring what was already paid to acquire it. Incremental cash contribution is the difference in that figure between two options for the same units, such as discounting versus liquidating.
Every seller with aged stock faces the same argument with their own P&L. The income statement charges cost of goods sold against each sale, so a unit bought for $9 and sold for $8 net of fees shows a $1 loss, and the instinct is to refuse the sale. But the $9 left the bank when the purchase order was paid. Selling the unit for $8 does not spend $9 again; it brings $8 in. Refusing the sale keeps the unit on a shelf where Amazon charges rent on it every month.
The accounting treatment is correct for the books. The P&L must show the loss, and the inventory write-down when it comes. The mistake is using the accounting figure to make the disposal decision. The disposal decision is about future cash, and the only costs that belong in it are the ones you have not paid yet: storage, surcharges, selling fees, removal fees. That is what cash contribution isolates.
Illustrative numbers. Take a seller with 400 units of a discontinued Home and Kitchen product at FBA on October 1. Landed cost was $9.00 per unit, $3,600 in total, paid in March. The units have been in the fulfillment network 200 days. Each is 0.1 cubic feet. Referral fee is 15 percent, per sell.amazon.com. Fulfillment fee is $4.60 per unit, the 2026 non-peak large standard rate for a 12 to 16 ounce product priced $10 to $50 on Amazon's Seller Central rate card, before the fuel surcharge added in April 2026.
Three options.
Option A: keep the price at $19.99. Sells 40 units a month, ten months to clear.
Option B: discount to $13.99. Sells 200 units a month, two months to clear.
Option C: liquidate. Illustrative recovery of $2.50 per unit, everything gone this month.
The accounting margin per unit, with COGS charged:
Read that way, A is the only acceptable option and B is forbidden. Now the cash contribution, counting only future cash.
The P&L called B a loss and C a bigger loss. On cash, B beats C by $1,775, which is the incremental cash contribution of discounting over liquidating. A still leads, by $994 over B, but only if 40 units a month holds for ten months. Drop that to 25 a month and A stretches to 16 months, the surcharge tail at $6.90 and $7.90 per cubic foot runs for most of a year, and A falls behind B. The accounting margin says nothing about any of this, because it does not contain a storage fee or a calendar.
The month-by-month storage arithmetic is laid out in the Q4 storage fee decision.
Crunch, the analytics AI inside ConnectBooks, applies this frame when a seller asks whether to liquidate, remove, or hold inventory ahead of Q4 storage fees. It treats already-paid COGS as sunk, then weighs future storage fees, long-term and aged inventory fees, expected sell-through, selling fees, sales velocity, expected cash recovery, and incremental cash contribution, and ranks SKUs as hold, discount, liquidate, or remove. The inputs come from inventory aging by warehouse and the fee history on reconciled settlements. It cannot supply the velocity at a discounted price, which is an estimate you provide, or the liquidation recovery, which is quoted per lot. The inventory aging report is where the units that need this treatment first show up.
No. Gross margin subtracts COGS. Cash contribution on inventory already owned does not, because that cash is gone. The two agree on a unit you have not bought yet, which is why cash contribution is a disposal tool, not a pricing tool for new purchase orders.
No. The P&L records the loss when the unit sells below cost, and a write-down if the units are impaired before they sell. Sunk-cost reasoning changes which option you pick, not how the books record it. Your CPA will want both figures.
That is a fourth option with its own column: negative removal fees now, plus whatever the other channel nets, minus its own fulfillment costs. Amazon's Seller Central removal fee page lists per-unit rates by weight band. It belongs in the comparison if you have the channel.
It can run the fee and storage side from reconciled data. It cannot know how price affects velocity, or what a liquidator will pay, without you. Those two assumptions decide the ranking, so test them before trusting the answer.
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