DEP Graywater Tax Credit Application

Per section 220.199, F.S., for taxable years beginning on or after January 1, 2024, and before taxable years beginning on January 1, 2027, a developer or homebuilder is eligible to receive a credit against the tax imposed under Chapter 220, F.S., for up to 50 percent of the cost of each NSF/ANSI 350 Class R certified noncommercial, residential graywater system purchased during the taxable year. To apply for this tax credit, please fill out this form. The tax credit may not exceed $4,200 for each system purchased. A developer or homebuilder may not receive total credits in excess of $2 million per taxable year.


Requirements to Apply for the State of Florida Graywater Tax Credit


  1. You are required to file the F-1120 Corporate Income/Franchise Tax return.
  2. You have a Federal Employer Identification Number (FEIN).
  3. You have proof of payment verifying the purchase of an NSF/ANSI 350 Class R certified noncommercial, residential graywater system purchased during a taxable year beginning on or after January 1, 2024, and before taxable years beginning on January 1, 2027.
  4. You have not already applied for a tax credit with this proof of payment. Only one proof of payment may be submitted per form (one proof of payment may be submitted for multiple units, however).
  5. The system(s) have been or will be installed in a single-family dwelling unit for reuse only in that dwelling unit in Florida.

Business Information

Nine-digits. Enter numbers only.


System Information

Taxable year the purchase was made.*

Date of purchase must be during taxable year for which you are going to claim the credit.

Start date of taxable year for the credit being claimed.*
End date of taxable year for the credit being claimed.*

Will this NSF/ANSI 350 Class R certified residential graywater system be installed in Florida or has it already been installed in Florida?*

You are not eligible for the tax credit if the system is not installed in Florida.


Installed System(s) Information

Make/model of NSF/ANSI 350 Class R certified residential graywater system.*
System 2: Make/model of NSF/ANSI 350 Class R certified residential graywater system.*
System 3: Make/model of NSF/ANSI 350 Class R certified residential graywater system.

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