Make a media plan for limited inventory
Prevent paid demand from exceeding what you can fulfill.
Start with sellable units
A promotion has 250 sellable units, and expected organic demand is 90 units. Reserve another 20 for replacements and stock uncertainty. That leaves 140 units for paid demand if buyers typically purchase one unit each.
Translate units into spending capacity
At an estimated $25 CPA per order and one unit per order, the starting capacity implies up to $3,500 in media. If buyers average 1.4 units, the same stock supports about 100 orders, or $2,500 at the same CPA.
Set a fulfillment stop condition
Check inventory and orders at agreed intervals. Pause or redirect ads before stock runs out, taking delayed conversions into account. Keep fallback copy and destinations ready so visitors see actual availability instead of a promotion they cannot redeem.
Try a related tool
Divide remaining spend by the days left in a campaign. Adjust the daily figure for changes in expected demand.
