diff --git a/apps/portal/src/utils/offers/analysis/analysisGeneration.ts b/apps/portal/src/utils/offers/analysis/analysisGeneration.ts
index fad35434..ecaed697 100644
--- a/apps/portal/src/utils/offers/analysis/analysisGeneration.ts
+++ b/apps/portal/src/utils/offers/analysis/analysisGeneration.ts
@@ -200,7 +200,7 @@ const calculatePercentile = (
 
     if (salary !== lastOfferSalary) {
       if (salary === offerToCalculateSalary && offerToCalculateIndex === -1) {
-        offerToCalculateIndex = i;
+        offerToCalculateIndex = numberOfNoDuplicateOffers;
       }
       numberOfNoDuplicateOffers++;
       lastOfferSalary = salary;