Compare marginal price bands with all-items tier pricing.
Does the reached price apply to every purchased item or only the next band?
Use the matching calculator
Use this decision sequence
- Read the supplier’s tier method instead of inferring it from the price table.
- Use strictly increasing inclusive upper item limits.
- For marginal pricing, split the order among the bands.
- For all-items pricing, use the reached band’s price for every item, and keep extras separate.
Keep the quantities distinct
| Quantity or assumption | How to use it |
|---|---|
| Marginal bands | Each band charges only its own items. |
| All-items tier | The reached price applies to the entire quantity. |
| Inclusive upper limit | An order equal to the limit remains within that band. |
Worked comparison
For an illustrative 15-item purchase, the first ten are quoted at $10 and the next ten at $8. Marginal pricing gives 10×10 + 5×8 = $140. If the quote instead applies the reached $8 price to every item, the same purchase is 15×8 = $120. A price table alone does not tell you which contract method applies.
Check before using the estimate
Enter actual commercial terms; delivery, minimum order and tax are not included unless separately calculated.
All dimensions, product properties, prices and specifications in this example are illustrative arithmetic inputs. Use the values from your measured plan, selected product data sheet and supplier quote. This guide does not choose construction specifications or certify safety.
Calculation and scope checked 2026-10-04. Methods and scope.