diff --git a/backend/Funding.py b/backend/Funding.py
index bd4b2edf..fe5165f6 100644
--- a/backend/Funding.py
+++ b/backend/Funding.py
@@ -603,6 +603,8 @@ class Funding:
             code = "RIRI_res_unin"
             pps = filtered_pps_matrix[filtered_pps_matrix["Measure_Type"] == code]
             if pps.shape[0] != 1:
+                if pps.empty and self.starting_sap_band in ["Low_C", "High_C", "Low_B", "High_B", "Low_A", "High_A"]:
+                    return 0
                 raise ValueError(f"Invalid RIRI category: {code}")
             return pps.squeeze()["Cost Savings"]