A buyer can love your product, agree it fills a real gap, and still not be able to write the order — because they're out of open-to-buy. OTB is the budget that governs when and how much a buyer can purchase in a given period, and it's the single most misunderstood force in the vendor-buyer relationship. Vendors who don't understand it mistime their pitches, misread rejections, and push for orders in weeks when the buyer literally has no money to spend. Vendors who do understand it sell with the buyer's budget instead of against it.

What Open-to-Buy Is

Open-to-buy is the portion of a buyer's merchandise budget that isn't yet committed — the dollars still available to spend on new goods for receipt in a period. Every buyer works to a merchandise plan: how much they expect to sell, how much inventory they need on hand, how much they'll mark down. OTB is what's left of the buying budget after everything already on order is subtracted. When it's open, they can buy. When it's spent, they can't — not until the next period frees up more.

The Math, Simply

Open-to-buy is retail math, usually calculated at retail value for a period (a month or a season):

OTB = Planned Sales + Planned Markdowns + Planned End-of-Period Inventory − Beginning Inventory − Merchandise Already On Order

Read it plainly: a buyer needs enough inventory to cover what they plan to sell, plus what they'll mark down, plus the stock they want on hand at the end of the period. Subtract the inventory they start with and everything already on order, and what remains is what they can still buy. If that number is healthy, there's room for your program. If it's near zero — or negative — there isn't, regardless of how good your pitch is.

Why "I Love It, But Not Now" Usually Means No OTB

When a buyer says the product is great but the timing isn't right, it's easy to hear it as a soft no. Often it's literal: they have no open-to-buy left in the period. The budget is committed, and they physically cannot write another PO until the plan resets. That's not a reason to walk away — it's information about when to come back. The interest is real; the budget just isn't there yet. Mistaking an OTB constraint for a lack of interest is how vendors abandon programs that were one period away from a yes.

OTB Is Dynamic

Open-to-buy isn't a fixed number set once — it moves with sales. When a category sells ahead of plan, OTB opens up: the buyer needs more inventory and has more budget to chase it. When sales come in under plan, OTB shrinks, and a buyer who is overbought — sitting on more inventory than the sales plan supports — can go to zero or negative, cutting orders and even canceling what's on the books. The same buyer who had room last month may have none this month, and the difference is how the category is selling.

How OTB Connects to Markdowns — and Your Reorder

Here's the part that ties directly to your program's performance: markdowns and overstock consume open-to-buy, and clean sell-through frees it. Inventory that doesn't move has to be marked down, and those markdowns eat into the budget that could have bought new goods — yours included. A program that sells through at full price and doesn't get marked down does the opposite: it turns fast, keeps the buyer's inventory healthy, and leaves OTB open for the reorder. The vendor whose goods perform isn't just earning a repeat order on merit — they're literally keeping the buyer's budget available to place it.

Sell With the OTB Calendar, Not Against It

Because OTB flows by period and by season, timing is everything:

  • Know the buyer's planning periods and when fresh OTB opens — typically at the start of a season, right after a category review.
  • Time your pitch and your PO ask to when the budget is available, not when it's committed.
  • Offer delivery flexibility. If your program is large, splitting deliveries across periods can let a buyer fit it into more than one OTB budget instead of blowing a single one — sometimes the difference between a yes and a "not now."
  • Position your program as OTB-efficient — high sell-through per dollar, fast turns — so funding it is easy.

Read the OTB Signals

The budget also tells you how to play each account. A buyer with leftover OTB near the end of a period is under pressure to spend it — an opening for an in-stock, quick-turn program. A buyer who is overbought won't reorder until the excess clears, no matter how well your item did — so you plan around the gap instead of pushing into a closed budget. Reading whether an account has room is as important as reading whether they have interest.

Open-to-buy is the clock behind every purchase order. Know when a buyer has money and when they don't, time your ask to the budget, and make your program the one that's easiest to fund — the one that sells through, turns fast, and keeps their OTB open for the next order.

What do you use today to track each buyer's open-to-buy and planning calendar — the buyer telling you, your own spreadsheet, syndicated data, or gut feel? We'd like to hear how you keep ahead of it.