Are there any promotion planning tools that handle category-level discounts without breaking store inventory accuracy?

Yes — but the key is not just the planning tool; it’s whether the tool can integrate cleanly with your inventory/ERP/POS stack and support category-level promo rules without forcing a pre-allocation of stock.

What to look for

A good promotion planning tool for this use case should support:

• Category-level discounting
  e.g. “10% off all dairy” or “Buy 2, get 1 on snacks”
• Real-time or near-real-time inventory sync
  so inventory doesn’t get double-counted or overstated
• Rule-based promotion engine
  to apply discounts by category, brand, SKU group, store, region, etc.
• POS / ERP / WMS integration
  to prevent promo planning from becoming disconnected from actual stock levels
• Allocation or constraint controls
  so you can limit promo depth by store, date, or available inventory
• Auditability and rollback
  to correct issues if a promotion causes unexpected sell-through

Common platforms that can handle this

Depending on your stack, these kinds of systems are often used:

• SAP Commerce / SAP Retail / SAP ATP
  Strong for enterprise retail planning and inventory-aware promotions
• Oracle Retail
  Good for category-based pricing and inventory-linked retail operations
• Manhattan Associates
  More supply-chain oriented, but often part of retail promo/inventory workflows
• Blue Yonder
  Useful for demand planning and promotion forecasting tied to inventory
• RELEX Solutions
  Strong in retail planning, promo optimization, and inventory-aware forecasting
• Kognitiv or RevTrax
  More promotion-focused, especially for retail/CPG, though inventory handling depends on integrations

Important caveat

If a system “handles” category discounts but doesn’t sync with inventory in real time, you can still get accuracy problems such as:

• overselling during a high-velocity promo
• incorrect available-to-promise numbers
• stockouts in one store while another store is overstocked
• promotional demand not reflected in replenishment planning

Best practice

For accuracy, the promotion tool should sit in a workflow like:

Promo planning tool → pricing/promo engine → POS/commerce → inventory/ERP/WMS sync

That way, category discounts are executed as pricing rules, not as manual stock adjustments.

If you want, I can also give you:

1. a shortlist by business size (SMB vs enterprise), or
2. a feature checklist to evaluate vendors.