Complete your US Federal Income Tax Form 1040 using my Microsoft Excel spreadsheet income tax calculator.
Navigate between pages using the drop down in the upper left corner.
UPDATE: The 2025 Federal Income Tax Spreadsheet (c) is now available. The 2026 Federal Income Tax Forecast Spreadsheet is currently being updated to match draft versions of IRS forms. The spreadsheet is republished as each is completed.
Thank you for using my spreadsheets!
Glenn Reeves October 9, 2026
As always, be sure to compare the spreadsheet output to your own calculations and to actual IRS forms and instructions.
Please let me know if you encounter any errors! Thank you for using my spreadsheets!!