Practical guide · Supplier rebates
Retroactive or incremental? How supplier rebate tiers really pay out.
The same three tiers can pay almost twice as much depending on one sentence in the agreement. Here is how to read it, calculate it and check what you were paid.
The short answer
A retroactive (all-units) tier applies the highest rate you reach to all eligible spend in the period. An incremental (banded) tier applies each rate only to the spend inside its band. With the tiers below and US$260,000 of spend, retroactive pays US$7,800 and incremental pays US$4,300.
Neither is wrong. What matters is that you know which one your agreement uses, and that you check the payment against it.
01 / Tiers
One supplier, one year, three tiers.
All figures are fictional and in US dollars. Eligible spend for the year is US$260,000.
| Annual eligible spend | Rebate rate |
|---|---|
| US$0 to US$99,999 | 1% |
| US$100,000 to US$249,999 | 2% |
| US$250,000 or more | 3% |
02 / Calculate
The same spend, two answers.
| Method | Calculation | Rebate |
|---|---|---|
| Retroactive (all units) | 260,000 × 3% | US$7,800 |
| Incremental (banded) | 100,000 × 1% + 150,000 × 2% + 10,000 × 3% | US$4,300 |
The difference, US$3,500, is 1.35% of the year's spend, decided by wording alone. That is why the method must be agreed in writing, not assumed.
03 / The cliff
Retroactive tiers have a cliff. Plan purchases around it.
Under the retroactive method, spend of US$249,000 earns 2% on everything: US$4,980. Spend of US$250,000 earns 3% on everything: US$7,500. One extra US$1,000 order earns an extra US$2,520 of rebate.
So near the end of the period, check how far you are from the next tier. If you were going to buy those goods next month anyway, buying them this month may be worth more than the goods' own margin. Incremental tiers have no cliff: each extra dollar earns only the rate of the band it falls in.
The free volume rebate calculator shows both methods side by side and how much more spend reaches the next tier.
04 / Wording
Which method does your agreement use?
| If the agreement says | It usually means |
|---|---|
| “on all purchases once annual spend reaches”, “from the first unit” | Retroactive |
| “on purchases above”, “on the portion between”, “for spend in excess of” | Incremental |
| Only a table of tiers and rates, no wording | Unclear: ask the supplier to confirm in writing |
While you have the agreement open, also note the period (calendar or fiscal year, quarterly), what counts as eligible spend (invoice value before or after tax, freight, discounts), which product groups are excluded, and when the rebate is paid.
05 / Check
Six common reasons a rebate payment comes in short.
Excluded product groups. The supplier left out a category your agreement includes, or the reverse.
Returns and credit notes. Returns were deducted twice, or deducted from the wrong period.
Period dates. The supplier counted by shipment date and you counted by invoice date, so orders near the boundary moved period.
The wrong method. The supplier paid incrementally on an agreement written retroactively.
A tier reached late. The payment was calculated before the final orders that crossed the tier.
Netted payments. The rebate was set off against an invoice, and nobody matched it to the agreement.
A difference is a reason to check with the supplier, not proof that money is owed. Bring the purchases behind your number, so the conversation is about specific invoices.
More than one supplier to check?
FOCUS Rebate Check holds each rebate deal, reads the purchase export you already have, and shows per supplier what you should have received, what arrived and every purchase behind each number. Free for up to 3 supplier agreements; your files stay on your computer.