A quarterly reminder system so 1040-ES payments are logged before the return

Form 1040-ES is how people pay tax on income that is not withheld, such as self employment, interest, dividends, rents, and similar items. If they did not elect voluntary withholding, it also covers things like unemployment and the taxable part of social security. (About Form 1040-ES)

The IRS says you generally must make estimated payments if you expect to owe at least $1,000 after withholding and refundable credits, and those amounts are less than the smaller of 90% of the current year tax or 100% of last year's tax (110% if last year's adjusted gross income was more than $150,000, or $75,000 if married filing separately). Last year's return has to cover 12 months. Farming, fishing, some household employers, short years, and nonresident aliens have different rules. Read Publication 505 before you treat a client as an exception. (Estimated tax FAQs, Publication 505)

• Remind anyone you put on Form 1040-ES at the last return, plus anyone you added mid year who now has unwithheld income.
• Skip W-2 only clients whose withholding already covers the safe harbor, unless they tell you about a large unwithheld item.
• If at least two thirds of gross income for the current or prior year is from farming or fishing, the estimated tax FAQ points you to Publication 505: they can pay the year's estimate by January 15, or file the return by March 1 and pay then. Do not put them on the April, June, September sequence unless Publication 505 says they belong there.
• The firm reminds and logs. The taxpayer pays, unless the engagement says you will submit the payment.

For estimated tax the year has four payment periods, each with its own due date. If they do not pay enough by that date, the IRS can charge a penalty even if they are due a refund when they file. If a due date falls on a Saturday, Sunday, or legal holiday, the payment is on time the next day that is not. Publication 505 prints the year table. Confirm it before you fill the email. (Publication 505, Estimated tax FAQs)

Publication 505 adds a January exception: if they file the Form 1040 or Form 1040-SR by January 31 and pay the rest of the tax then, they do not need the January 15 estimated payment. Put that in the Q4 heads up so they do not pay twice or skip both. (Publication 505)

Direct Pay is the IRS page for paying from a bank account with no sign in. It covers individual estimated tax. They can change or cancel within 2 days of a scheduled payment. A confirmation is the proof, not a text that says "I paid." (Direct Pay)

Every reminder asks for the same four fields. If one is missing, the log row is not done.

• Amount paid (dollars, not 'the usual').
• Date paid (the date the IRS will treat as the payment date).
• Method (Direct Pay, EFTPS, card, or a Form 1040-ES voucher).
• Confirmation number, plus the Direct Pay or EFTPS receipt uploaded to the portal.

Do not let them email a photo of a bank app. Name the folder and the year. The TaxDome chasing workflow is how the file request actually leaves the firm.

Send two weeks before the due date to everyone with an open row for that period. The amount is the figure from last year's return or the worksheet you already sent, not a new calculation in the email.

Send only if the log still has no confirmation. One screen. No new tax advice.

Send the business day after the due date if the row is still empty. You are logging a miss, not scolding.

After Email 3, call once. Then stop. A missed quarter is a fact on the payment log. It is not an open chase into February.

Estimated payments, plus any overpayment credited from last year, go on Form 1040 when they file. The IRS estimated tax FAQ points you to that reporting line and to Publication 505. Your log is how the preparer fills it without a March reconstruction. (Estimated tax FAQs)

One sheet per year. Admin owns the chase. A CPA uses the sheet at return time. Nobody pays from this log unless the engagement says the firm will originate the payment.

Download the estimated tax payment log. One row per client per quarter. Copy it each calendar year. Fill amounts from last year's return, confirmations from the portal, never from a chat.

The tax season operator can draft the three emails from the open rows. Your staff still approve what goes out. Your CPA still reviews and signs every return.