BFCM 2026 · Amazon deal calculator

    Will your Amazon deal pay for the units you'd sell anyway?

    Event traffic lifts sales with or without a discount. One product, one minute: see the lift your deal needs to break even, the deepest discount that still pays, and how much stock to send in.

    Free, no email to use itOne ASIN at a timeFull multi-ASIN planner below
    01

    Your product

    Use your last 28 normal days. Fees come off the price the customer pays, so they shrink when you discount. Product cost doesn't.

    $
    $
    $
    %
    $
    Deal fee and inventory buffer
    $
    %
    days
    Profit per unit, full price
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    Profit per unit, on deal
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    Read
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    02

    Your event and your deal

    Lift means event-day sales ÷ normal-day sales. Pull it from your last event if you have one. If you don't, guess low.

    x
    x
    20% off
    Work out your lift from a past event
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    Were you on a deal that event? Put it in "lift you expect on deal." No deal? Put it in "lift with no deal."

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    Lift you need vs lift you expect
    Expected: –Needed: –
    Event profit, no deal
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    Event profit, on deal
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    Deepest discount that pays
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    At your expected lift
    Extra units to send in
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    03

    The lift each depth needs

    Deeper deals cut profit per unit fast, so the lift you need climbs faster than the discount. Past a point, no lift saves it.

    Deal depthProfit per unitLift needed to break evenEvent profit at your expected liftvs no deal
    The full version

    Plan every ASIN at once.

    The free planner workbook runs this for your whole catalog: paste your past events and it works out each product's real lift, sets a depth from it, flags deals that go past the break-even ceiling and sizes the inbound shipment.

    • Lift history from every past Prime Day and BFCM
    • A discount ladder you can edit, against a margin ceiling
    • Top sellers held at full price automatically
    • Units to send and days of cover per ASIN
    Or get the free audit, Amazon included

    Get the multi-ASIN deal planner

    Excel workbook, works in Google Sheets. Fictional sample rows to show you the format.

    I may follow up once about your Black Friday plan. That's it.

    04

    How the math works

    Profit per unit
    Price, minus referral fee on the price paid, minus landed cost, FBA fee and ad cost per unit. Ads are in so the answer is closer to what hits the bank.
    Lift
    Event units per day ÷ normal units per day. "No deal" lift is what the event's traffic gives you anyway. It's the bar the deal has to clear.
    Lift needed to break even
    No-deal lift × full-price profit ÷ deal profit, plus whatever the deal fee adds. Clear it and the deal earns more than standing pat.
    Deepest discount that pays
    The depth where profit on deal, at your expected lift, equals profit with no deal.
    Extra units to send in
    Extra event units above a normal run, plus your buffer for the ramp and tail, with a floor of your minimum cover days.