EXHIBIT 10(b) MONTHLY SERVICER'S CERTIFICATE CONSUMERS FUNDING LLC $468,592,000 SECURITIZATION BONDS, SERIES Pursuant to Section 3.05 of the Servicing Agreement dated as of November 8, 2001 (the "Consumers Servicing Agreement") between Consumers Energy Company, as Servicer and Consumers Funding LLC, as Issuer, the Servicer does hereby certify as follows: Capitalized terms used in the Monthly Servicer's Certificate (the "Monthly Certificate") have their respective meanings as set forth in the Servicing Agreement. References herein to certain sections and subsections are references to the respective sections of the Servicing Agreement. Current BILLING MONTH: May 2005 CURRENT BILLING MONTH 5/4/2005 - 6/2/2005 COLLECTION CURVE 100% STANDARD BILLING FOR PRIOR BILLING MONTH Residential Total Billed $129,992,518 Residential SECURITIZATION CHARGE (SC) Billed $ 1,231,522 0.947% Commercial Total Billed $ 79,617,681 Commercial SECURITIZATION CHARGE (SC) Billed $ 1,305,458 1.640% Industrial Total Billed $ 44,813,318 Industrial SECURITIZATION CHARGE (SC) Billed $ 1,355,696 3.025% YTD NET WRITE-OFFS AS A % OF BILLED REVENUE Non-Residential Customer Net Write-offs 0.130% Residential Customer Net Write-offs 0.320% Total Net Write-offs 0.210% AGGREGATE SC COLLECTIONS TOTAL SC REMITTED FOR BILLING MONTH Residential Class SC Collected $ 1,182,266 Commercial Class SC Collected $ 1,318,805 Industrial Class SC Collected $ 1,304,271 Total SC Collected $ 3,805,342 Aggregate SC Remittances for April 2005 BILLING MONTH $ 3,734,209 Aggregate SC Remittances for May 2005 BILLING MONTH $ 3,805,342 Aggregate SC Remittances for June 2005 BILLING MONTH TOTAL CURRENT SC REMITTANCES $ 7,539,551 Page 1 of 3 CURRENT BILLING MONTH 5/4/2005 - 6/2/2005 COLLECTION CURVE 100% CALCULATED SC COLLECTED AMOUNT RESIDENTIAL A-1 Residential SC Collected $1,124,833 A-3 Residential T.O.D. SC Collected $ 4,312 A-4 Alternate Residence SC Collected $ 26,519 A-5 Residential Farm/Life Support SC Collected $ 26,602 TOTAL RESIDENTIAL SC COLLECTED $1,182,266 COMMERCIAL B-1 General Primary (041) SC Collected $ 19,124 B-General Secondary (010) SC Collected $ 230,687 C- General Secondary (011) SC Collected $ 452,470 D-General Primary (018) SC Collected $ 290,238 F-Primary High Load Factor (032) SC Collected $ 47,103 GH-General Service Heating (013) SC Collected $ 4,386 H- Water Heating Service (014) SC Collected $ 545 L-1 General Energy-Only Street Lighting SC Collected $ 2,127 L-2 General Service (Cust Owned) St Light SC Collected $ 2,085 L-3 General Service (Co Owned) St Light SC Collected $ 11,465 L-4 General Service Outdoor Lighting Commercial SC Collected $ 0 PS-1 General Secondary Public Pumping SC Collected $ 7,208 PS-2 General Primary Public Pumping SC Collected $ 8,068 PS-3 General Optional Primary Public Pumping SC Collected $ 41,973 R-1 General Secondary Resale SC Collected $ 5 R-2 General Secondary Resale SC Collected $ 829 R-3 General Primary Resale SC Collected $ 27,777 ROA-P Retail Open Access Primary (110) SC Collected $ 118,129 ROA-S Retail Open Access Secondary Com SC Collected $ 44,976 SC - Special Contract Commercial SC Collected $ 1,809 SPEC Grand Rapids Special Contract SC Collected $ 2,504 UR-General Unmetered SC Collected $ 5,297 TOTAL COMMERCIAL SC COLLECTED $1,318,805 INDUSTRIAL B-1 General Primary (042) SC Collected $ 19,947 B-General Secondary (020) SC Collected $ 33,673 C- General Secondary (021) SC Collected $ 71,634 CG-Cogeneration/Small Power Production Purchase SC Collected $ 682 D-General Primary (028) SC Collected $ 454,677 F-Primary High Load Factor (033) SC Collected $ 60,092 GH-General Service Heating (023) SC Collected $ 48 GMD General Motors SC Collected $ 50,142 GMF General Motors SC Collected $ 103,308 GMJ-1 General Motors SC Collected $ 6,580 H- Water Heating Service (024) SC Collected $ 0 Page 2 of 3 CURRENT BILLING MONTH 5/4/2005 - 6/2/2005 COLLECTION CURVE 100% I-General Primary Interruptible (034) SC Collected $ 3,423 J-1General Alternative Electric Metal Melting SC Collected $ 36,362 J-General Primary Electric Furnace (037) SC Collected $ 7,160 L-4 General Service Outdoor Lighting Industrial SC Collected $ 1 R-3 General Primary Resale (027) SC Collected $ 1,102 ROA-P Retail Open Access Primary (111) SC Collected $ 290,747 ROA-S Retail Open Access Secondary Ind SC Collected $ 7,441 SC - Special Contract Industrial SC Collected $ 157,252 TOTAL INDUSTRIAL SC COLLECTED $1,304,271 TOTAL SC COLLECTED $3,805,342 Executed as of this 14th day of June 2005. CONSUMERS ENERGY COMPANY AS SERVICER /s/ Glenn P. Barba --------------------------------------- Glenn P. Barba, Vice President, Controller and Chief Accounting Officer CC: Consumers Funding LLC One Energy Plaza Jackson, Mi 49201 Page 3 of 3