Income Calculator
With a growing workforce of self-employed borrowers and increased awareness of using rental property to build generational wealth, originators have the opportunity to serve more borrowers. Fannie Mae’s Income Calculator provides a more efficient and accurate way to calculate income while increasing the certainty of the calculation.
- Simplified income calculations: Ensure accuracy and efficiency by tackling complex income calculations for self-employed borrowers, rental property owners, and business owners.
- Maximized qualifying income: By incorporating all income add-backs, the tool may help qualify more borrowers.
- Reduced cycle times: Fast income calculation results may allow lenders to more quickly proceed with the underwriting process.
- Compliance and reliability: The tool is in alignment with Fannie Mae Selling Guide policy and may offer enforcement relief of reps and warrants on the income calculations.
Income Calculator Availability
Every day, 24 hours a day, except from 1 a.m. to 5 a.m. ET the first and third Sundays each month due to maintenance.
Income Calculator was chosen as a 2025 HousingWire Tech100 Mortgage Winner.
2024: A Year of Impact
Income Calculator served borrowers with income from:
Self-employment (including gig income)
Business ownership
Rental properties (Schedule E, Part I)
Looking ahead: Income Calculator will soon support evaluations with:
- Complex rental income
- Variable income (fluctuating hourly, bonus, overtime, commission)
- Farm income
How to use Income Calculator
From our website
Income Calculator is available as a web interface where the user follows step-by-step instructions to transcribe tax return data to Income Calculator. Once the data input is completed, Income Calculator instantly provides the qualifying monthly income amount along with a downloadable PDF findings report.
Benefits:
- Unlimited, free income calculations
- Immediate response
Requirements:
- Users must be mortgage professionals
Check out the tool:
Full integration
Income Calculator is available via approved integrators, where the tool is accessed from the integrator’s system. The user uploads tax returns to the integrator who then extracts the tax return data, submits it to Income Calculator for evaluation, and provides the response back to the user. Lenders may also directly integrate with Income Calculator.
Benefits:
- Greatly reduces manual data entry
- Seamless experience within your existing systems
Requirements:
- Contract with an authorized technology service provider
- Contract with Fannie Mae
Contact an authorized provider for a demo:
Blueprint Blue Sage CoreLogic LoanLogics PointServ
Technology service providers (TSPs): Interested in integration opportunities with Income Calculator? Review the TSP readiness checklist.
LOS iFrame
Income Calculator is available within approved LOS providers where the user follows step-by-step instructions to transcribe tax return data to Income Calculator within the LOS. Once the data input is completed, Income Calculator instantly provides the qualifying monthly income amount along with a downloadable PDF findings report.
Benefits:
- Seamless experience within your LOS
Requirements:
- Contract with an authorized technology service provider
Contact an authorized provider for a demo:
Technology service providers (TSPs): Interested in integration opportunities with Income Calculator? Review the TSP readiness checklist.
Import tax return data
Approved providers extract data from the borrower’s tax documents in minutes and provide a data file for import into the Income Calculator web interface. The user must manually supplement additional required data and may adjust other data as needed before submitting for an evaluation and getting an instant response.
Benefits:
- Greatly reduces manual data entry
- Faster data extraction for quick results
Requirements:
- Contract with an authorized technology service provider
Contact an authorized provider for a demo:
Technology service providers (TSPs): Interested in integration opportunities with Income Calculator? Review the TSP readiness checklist.
Compare methods to use Income Calculator:
| Fannie Mae Web Interface | Full TSP Integration | LOS iFrame | Import File Creation | |
|---|---|---|---|---|
| Where does the user initiate the request? | Fannie Mae website | TSP’s website | LOS | TSP’s website |
| How is the tax return data obtained? | Manual data input by user | Electronically extracted or exported from e-filers by TSP | Manual data input by user | Electronically extracted by TSP |
| What is the response time for tax return data extraction? | N/A | Per TSP (generally less than 2 hours) | N/A | Per TSP (generally less than 5 minutes) |
| Where is non-tax return data input (e.g. employment start date)? | Fannie Mae website | LOS (if integrated) or TSP’s website | Fannie Mae website accessed within LOS | Fannie Mae website |
| Where does the user view the response? | Fannie Mae website | TSP’s website | Fannie Mae website | Fannie Mae website |
| Is there a cost? | No | Yes – through contract with an authorized TSP | Yes – through contract with an authorized LOS | Yes – through contract with an authorized TSP |
| Is a signed Fannie Mae agreement required? | No | Yes | No | No |
| Am I required to be an authorized Fannie Mae seller? | No | No | No | No |
