Exhibit 10(a) 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: July 2005 CURRENT BILLING MONTH 7/5/2005 - 8/2/2005 COLLECTION CURVE 100% STANDARD BILLING FOR PRIOR BILLING MONTH Residential Total Billed $111,232,568 Residential SECURITIZATION CHARGE (SC) Billed $ 1,365,724 1.228% Commercial Total Billed $ 78,792,830 Commercial SECURITIZATION CHARGE (SC) Billed $ 1,406,947 1.786% Industrial Total Billed $ 44,403,745 Industrial SECURITIZATION CHARGE (SC) Billed $ 1,360,285 3.063% YTD NET WRITE-OFFS AS A % OF BILLED REVENUE Non-Residential Customer Net Write-offs 0.250% Residential Customer Net Write-offs 0.300% Total Net Write-offs 0.270% AGGREGATE SC COLLECTIONS TOTAL SC REMITTED FOR BILLING MONTH Residential Class SC Collected $ 1,522,568 Commercial Class SC Collected $ 1,455,967 Industrial Class SC Collected $ 1,266,438 ------------ Total SC Collected $ 4,244,973 Aggregate SC Remittances for July 2005 BILLING MONTH $ 4,244,973 Aggregate SC Remittances for August 2005 BILLING MONTH $ 0 Aggregate SC Remittances for September 2005 BILLING MONTH $ 0 TOTAL CURRENT SC REMITTANCES $ 4,244,973 Page 1 of 3 CURRENT BILLING MONTH 7/5/2005 - 8/2/2005 COLLECTION CURVE 100% CALCULATED SC COLLECTED AMOUNT RESIDENTIAL A-1 Residential SC Collected $ 1,451,856 A-3 Residential T.O.D. SC Collected $ 4,772 A-4 Alternate Residence SC Collected $ 35,508 A-5 Residential Farm/Life Support SC Collected $ 30,432 TOTAL RESIDENTIAL SC COLLECTED $ 1,522,568 COMMERCIAL B-1 General Primary (041) SC Collected $ 22,671 B-General Secondary (010) SC Collected $ 286,066 C- General Secondary (011) SC Collected $ 493,270 D-General Primary (018) SC Collected $ 318,792 F-Primary High Load Factor (032) SC Collected $ 50,253 GH-General Service Heating (013) SC Collected $ 3,252 H- Water Heating Service (014) SC Collected $ 669 L-1 General Energy-Only Street Lighting SC Collected $ 1,543 L-2 General Service (Cust Owned) St Light SC Collected $ 2,427 L-3 General Service (Co Owned) St Light SC Collected $ 8,088 PS-1 General Secondary Public Pumping SC Collected $ 7,529 PS-2 General Primary Public Pumping SC Collected $ 7,325 PS-3 General Optional Primary Public Pumping SC Collected $ 51,419 R-1 General Secondary Resale SC Collected $ 97 R-2 General Secondary Resale SC Collected $ 965 R-3 General Primary Resale SC Collected $ 30,281 ROA-P Retail Open Access Primary (110) SC Collected $ 114,900 ROA-S Retail Open Access Secondary Com SC Collected $ 48,893 SC - Special Contract Commercial SC Collected $ 2,361 UR-General Unmetered SC Collected $ 5,166 TOTAL COMMERCIAL SC COLLECTED $ 1,455,967 INDUSTRIAL B-1 General Primary (042) SC Collected $ 20,751 B-General Secondary (020) SC Collected $ 34,183 C- General Secondary (021) SC Collected $ 74,624 CG-Cogeneration/Small Power Production Purchase SC Collected $ 164 D-General Primary (028) SC Collected $ 501,633 F-Primary High Load Factor (033) SC Collected $ 67,854 GH-General Service Heating (023) SC Collected $ 23 GMD General Motors SC Collected $ 56,867 GMF General Motors SC Collected $ 118,691 GMJ-1 General Motors SC Collected $ 6,910 H- Water Heating Service (024) SC Collected $ 0 I-General Primary Interruptible (034) SC Collected $ 0 J-1General Alternative Electric Metal Melting SC Collected $ 32,950 Page 2 of 3 CURRENT BILLING MONTH 7/5/2005 - 8/2/2005 COLLECTION CURVE 100% J-General Primary Electric Furnace (037) SC Collected $ 12,559 R-3 General Primary Resale (027) SC Collected $ 1,179 ROA-P Retail Open Access Primary (111) SC Collected $ 280,531 ROA-S Retail Open Access Secondary Ind SC Collected $ 7,084 SC - Special Contract Industrial SC Collected $ 50,435 TOTAL INDUSTRIAL SC COLLECTED $ 1,266,438 TOTAL SC COLLECTED $ 4,244,973 Executed as of this 9th day of August 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