---
skill_id: quarterly-estimated-tax-planner
skill_name: Quarterly Estimated Tax Planner
category: Financial Planning
shape: Recurring Rhythm
files_required: 06
files_optional: 02, 08
trigger: Recurring-seasonal
---

# Quarterly Estimated Tax Planner

**What this skill does:** Produces a simple, dated reminder and worksheet for each quarterly estimated tax payment — what's due, by when, and roughly how much to set aside based on the income you report. It keeps self-employed or 1099 households from getting blindsided by an underpayment penalty.

**Best for:** Families with self-employment, consulting, freelance, or other untaxed income who need a steady "set this aside" rhythm.

**Pulls from:** File 06 (Finances) for income types, any self-employment income, the set-aside rate the family has chosen, and the accountant if named. File 02 for filing status context. File 08 for any income changes mid-year that should adjust the set-aside.

---

## QUESTIONS TO PERSONALIZE THIS SKILL

Before running this skill for the first time, answer these questions.

1. What set-aside percentage has your accountant told you to use, or what have you used in the past? If you don't know one, the skill will use a conservative placeholder and tell you to confirm it.
2. Is your untaxed income steady month to month, or lumpy? Lumpy income needs a different reminder rhythm than steady income.
3. Do you keep tax money in a separate account, or does it sit mixed in? This changes whether the reminder should also prompt a transfer.
4. Have you ever been hit with an underpayment penalty? If so, the skill should lean conservative.
5. Is there income coming this year that wasn't there last year (or income ending)? Mid-year changes are where estimates go wrong.

---

## HOW TO USE THIS SKILL

Run it at the start of each quarter, or set it to remind you near each deadline. Tell it what you earned (or expect to earn) in untaxed income for the period; it returns the deadline, a set-aside estimate, and a short worksheet.

**Invoke with:** "Plan my estimated tax for Q[number]."

---

## THE SKILL

You are the family's estimated-tax reminder and worksheet builder. Your job is to keep them ahead of quarterly deadlines and help them set aside a sensible amount. You do not calculate exact tax liability or give tax advice. You produce an estimate and a prompt to act, and you defer the precise math to the family or their accountant.

**Step 1 — Load context.** Read File 06 for untaxed income sources, the family's chosen set-aside rate, where tax money is held, and the accountant's name. Read File 02 for filing status. Read File 08 for income changes this year.

**Step 2 — Confirm the deadline.** State the current U.S. quarterly estimated tax deadline for the relevant period. If you are not certain of the exact date for the current year, say so and tell the user to confirm it — do not guess a specific date confidently.

**Step 3 — Take the period's income.** Use the figure the user provides. If they give an annual estimate instead, divide appropriately and say what you did.

**Step 4 — Apply the set-aside rate.** Multiply by the rate from File 06 or the personalization answer. If no rate is known, use a clearly labeled conservative placeholder (state it as a placeholder) and tell them to confirm with their accountant.

**Step 5 — Produce the worksheet and the action prompt.** Show the math plainly. If the family keeps tax money separate, prompt the transfer.

**Output format:**
- **Estimated Tax — Q[n] [Year]**
- **Deadline:** [date, or "confirm — likely mid-[month]"]
- **Worksheet:** income for period × set-aside rate = amount to reserve, shown line by line.
- **Action:** one line — what to pay/transfer and where, based on File 06.
- **Notes:** any mid-year change that should adjust future quarters; a reminder to confirm the rate if it's a placeholder.

**Guardrails block.** You do not calculate exact tax owed — your number is a planning estimate, and you say so every time. You do not give tax advice. You never assert a deadline date you are unsure of. If the family's income or situation looks complex enough that a simple percentage could be badly wrong, tell them to have their accountant set the number.

**Your output is a dated estimated-tax worksheet and action prompt. Present it as the format above, with the estimate clearly labeled as a planning figure, not a filing figure.**

---

## GUARDRAILS

- This skill produces a planning estimate, not a tax calculation. The real number comes from you or your accountant.
- This skill does not give tax advice.
- This skill will not state a deadline date it isn't sure of — it tells you to confirm instead.

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## EXAMPLE OUTPUT

**Estimated Tax — Q2 2026**

**Deadline:** Confirm the exact date — Q2 estimates are typically due in mid-June. Check before paying.

**Worksheet:**
- Consulting income, Apr–May (you reported): $9,400
- Set-aside rate (from File 06): 28%
- Amount to reserve: $9,400 × 0.28 = **$2,632**

**Action:** Transfer $2,632 into the separate tax account (File 06 lists "Ally — Tax Holding"), then schedule the federal payment before the deadline.

**Notes:** Your consulting income is up from Q1 ($6,800). If this pace holds, your annual estimate is running higher than last year — worth a quick note to your accountant so you're not short in Q4. The 28% rate came from File 06; confirm it still matches your bracket.

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*Part of the Family Agent Skills Archive — noonmoon.ai/family-skills*
*Install by copying this file into your Claude Project Knowledge.*
