Wholesale pricing formulas

The supplier margin uses invoice price as the denominator after estimated percentage deductions and landed cost. It is not markup on landed cost. The retailer view assumes it sells at MSRP without its own discounts, payment fees, freight, shrink, labor, or returns.

Worked U.S. consumer-goods example

The default unit costs $20 to make or purchase, $2 to package, and $1 of allocated freight, for $23 landed cost. Sales commission is 5 percent of the discounted invoice, marketing allowance is 3 percent, and expected returns or credits are 2 percent. Those channel deductions consume 10 percent of invoice value.

To preserve a 40 percent supplier margin after both channel deductions and landed cost, the required discounted invoice price is $46. A 5 percent order discount means wholesale list must be about $48.42 so the actual invoice falls to $46. Commission is $2.30, allowance $1.38, return reserve $0.92, and supplier contribution $18.40 per unit.

At a $100 MSRP, the retailer has $54 of gross profit and a 54 percent gross margin before its own costs. The maximum invoice that preserves a 50 percent retailer margin is $50, leaving $4 between that limit and the supplier’s required $46. A 100-unit order lists for about $4,842.11, invoices for $4,600, and produces $1,840 of modeled supplier contribution.

Build a landed unit cost that survives scale

Average cost can hide expensive small runs, expedite, scrap, minimum buys, and seasonality. Create cost versions by factory, lane, case pack, and order size. Recalculate after duty, commodity, wage, freight, or packaging changes.

Channel deductions are part of the price

Sales representatives, distributors, marketplaces, brokers, buying groups, and retailers may receive commission, rebate, co-op advertising, slotting, markdown support, early-payment discount, damage allowance, return rights, data fee, chargeback, or free goods. A clean invoice can later become a much lower net realization.

Convert predictable deductions to a rate only after reviewing actual contracts. Fixed fees behave differently at low volume. Timing matters because rebates and returns can settle months later. Track gross-to-net reserves by customer, program, SKU, and period.

Do not hide a retailer service inside a product discount without legal and accounting review. Promotional allowances and services can raise different Robinson-Patman questions from price differences.

Leave enough retailer economics beyond gross margin

Retailer gross margin must fund labor, rent, storage, payment processing, shrink, freight, marketing, markdowns, fulfillment, returns, customer service, and profit. A nominal 50 percent margin can be unattractive for bulky, fragile, slow, seasonal, or high-return products.

Model expected actual selling price rather than MSRP when promotions are frequent. If the retailer averages 20 percent off a $100 MSRP, its realized selling price is $80 and the same $46 invoice yields only 42.5 percent margin before other costs.

Inventory turns and payment terms also matter. A lower-margin item that sells quickly and pays early can create better annual return on inventory than a high-margin item that sits. Provide case packs and reorder quantities the channel can absorb.

Design volume discounts from cost-to-serve evidence

A volume discount can reflect lower sales, production, picking, packaging, shipping, billing, or credit cost per unit. Compare full cost-to-serve by order size and customer. Do not assume every large account is cheaper after custom routing, compliance, data, deductions, returns, and long payment terms.

The calculator grosses up list price so the entered discount lands at the supplier’s required invoice. If different tiers apply, repeat the calculation at each tier using its actual cost and deduction structure. State whether quantity is per order, month, SKU, family, or annual commitment.

Document earned versus off-invoice treatment, retroactive rebates, true-ups, forecast obligations, cancellations, and audit. A discount without a measurable condition invites inconsistency and margin leakage.

Stress-test promotion, payment, and return assumptions

Save at least three versions of the model: base trade, planned promotion, and downside. In the promotion case, replace MSRP with the expected transaction price and add temporary markdown funding to the allowance rate. In the downside case, increase returns, damage, freight, and chargeback assumptions together. This shows whether an apparently attractive list price still produces contribution when several commercial risks occur in the same order.

Payment terms also consume economics even when they do not appear as a line-item deduction. Estimate the cash cost of net 30, net 60, or net 90 terms using the supplier’s borrowing or opportunity rate, then compare it with any early-payment discount. Test retailer insolvency and disputed-deduction exposure separately; a percentage reserve based on stable history does not describe a concentrated credit loss.

After launch, replace forecasts with invoice-to-cash evidence. For each customer and SKU, reconcile invoiced sales, discounts, earned rebates, promotional claims, returns, freight, commissions, bad debt, and payment days. Investigate variance before expanding a tier. A wholesale schedule should be a controlled decision record with an owner, effective date, expiration date, approval, and source data, not a number copied indefinitely from an old price file.

U.S. wholesale pricing and antitrust boundaries

The FTC explains that Robinson-Patman issues can arise when sellers charge competing buyers different prices for commodities of like grade and quality and specified competitive-injury and commerce conditions are met. Cost justification and good-faith meeting competition can be defenses in appropriate facts, but the analysis is legally complex.

The FTC also explains that MSRP is suggested: dealers generally set resale prices independently, and competitors cannot agree on wholesale or retail prices. Minimum advertised price, resale policy, selective distribution, promotion, and termination require legal review under federal and state law.

Keep cost-justification analyses, discount schedules, offer communications, promotional availability, contracts, and approvals. Do not use this calculator as evidence that a price difference is lawful.

Accounting and tax boundaries

Net revenue can differ from invoice because rebates, returns, credits, commissions, allowances, shipping, sales tax, and payment terms have different accounting treatment. Inventory cost and COGS require consistent methods. Reconcile the unit model to the ledger and gross-to-net reserves.

IRS Publication 334 discusses business income, expenses, inventory, and records for U.S. small businesses. Tax capitalization, inventory, deductions, related parties, and timing depend on facts and current rules. A target margin does not determine taxable profit.

Wholesale price-file checklist

1. Confirm unit of sale and case pack.
2. Reconcile product landed cost.
3. Define freight terms.
4. Load commissions and distributor share.
5. Accrue allowances and returns.
6. Use margin, not markup, intentionally.
7. Test actual retail selling price.
8. Model retailer cost to serve.
9. Document discount qualifications.
10. Review Robinson-Patman exposure.
11. Preserve independent resale decisions.
12. Version and approve the price file.

Frequently asked questions

References

• Federal Trade Commission, Robinson-Patman price discrimination guidance
• Federal Trade Commission, manufacturer-imposed requirements and MSRP
• Federal Trade Commission, guide to U.S. antitrust laws
• IRS Publication 334, Tax Guide for Small Business
• U.S. Small Business Administration, cost and break-even guidance