A spreadsheet, a 15-page survival guide, an IRS penalty abatement letter, a 50-state cheat sheet, a CPA handoff checklist, and a calendar file with every deadline. One download. $17.
The IRS underpayment penalty isn't huge — but it isn't nothing. On a $15,000 tax bill, missing all four quarterly payments costs about $400–$800 in pure waste. It's not deductible. It doesn't reduce next year's bill. It's gone.
Not a "bundle" in the lazy sense — every file targets a different moment in your quarterly tax year. The spreadsheet runs the math, the guide explains why, the letter is your insurance against last year's mistake, the cheat sheet is your map, the checklist is for your CPA meeting, and the calendar makes sure you never miss again.
9-tab workbook for Excel and Google Sheets. Dashboard view, full SE + federal + state tax math, Q1–Q4 payment tracker, both IRS safe-harbor tests, and three worked-out examples.
Standalone value: ~$15Plain-English explainer of every rule the spreadsheet applies — why quarterly taxes exist, the penalty math, both safe-harbor rules, state systems, where to actually pay, and what to do if you missed a quarter.
Standalone value: ~$10If the underpayment penalty already hit you last year, the IRS First-Time Abatement program will refund it — if you have the right letter. This is that letter.
CPA charge to write this: $200+Every state plus DC: top marginal rate, where to pay, which form, and the few states with non-standard quarterly rules. Stop googling four times a year.
Standalone value: ~$7Printable one-pager. Tick boxes as you gather documents, hand the whole stack to your CPA in January. Plus the four questions you should always ask before leaving the meeting.
Standalone value: ~$7Drag into Apple Calendar, Google Calendar, or Outlook. All 2026 and 2027 deadlines with 7-day and 1-day reminder alarms built in. One drag, reminders set forever.
Standalone value: ~$5Filing status, state, expected income, last year's tax. Federal brackets and SS wage base are editable for any year so you reuse the file every January.
Month-by-month projection across up to 6 income streams — gig + Airbnb + Etsy + freelance + W-2, whatever applies. The total feeds the Tax Calculator automatically.
Q1–Q4 targets appear with due dates. Log each payment as you make it. The status column turns green when on track, amber when partial, red when behind.
The math is the same whether you're a Dasher or a part-time freelancer. The spreadsheet handles every income type below in one file.
Seven-day no-questions-asked refund through Gumroad. And the penalty abatement letter alone can refund $400+ from last year's tax bill — that's 23× the price of the bundle from one file.
Get the bundle — $17 →Yes. Drag the .xlsx file into your Google Drive — Sheets converts it cleanly and every formula keeps working. Tested on Excel 2016+, Excel for Mac, Numbers (light styling differences), and Google Sheets.
Yes — it's actually most useful for first-year filers, because you don't know yet what your tax bill will be. The Tax Calculator estimates your full-year liability from your income forecast, and the safe-harbor logic protects you even when last-year data isn't available.
No — and it's not trying to. This handles the math your CPA charges you for as a side note (quarterly calculations, payment tracking, safe-harbor checks). When you actually file in April, a CPA is still worth it for QBI optimization, audit risk, and complex situations. The CPA Handoff Checklist in the bundle is specifically about making that meeting cheaper and faster.
Yes, for qualifying taxpayers. The IRS First-Time Abatement (FTA) program is a real administrative waiver that's been around since 2001. Most people who qualify don't know it exists. The letter walks through the three qualification rules and uses the same language CPAs use when requesting FTA. Not legal advice — every situation differs, but the program itself is real and routine.
Gumroad's 7-day refund applies, no questions. Open the files, click around, decide if it works for you. If it doesn't, request the refund through Gumroad and the charge is reversed.
Free quarterly tax content is everywhere — including 15+ free guides on this site. What's not free is a complete system: a spreadsheet that does the math, a guide that explains it, a letter that recovers last year's penalty, and a calendar that prevents next year's. Charging $17 also funds the time to keep the spreadsheet updated each January when the IRS publishes new brackets.