IRS Lost Earnings Calculator

Calculator Form

Plan name

Participant name

Contribution type

Principal amount

Loss date

Recovery date

Final payment date

Annual earnings rate (%)

Compounding method

Restoration of profits

Fees or charges reimbursed

Participant count

Principal status

Internal notes

Formula Used

The calculator estimates lost earnings from the principal amount, annual rate, late days, and selected compounding method.

Simple interest uses: Lost Earnings = Principal × Annual Rate × Late Days ÷ 365

Compounded earnings use: Lost Earnings = Principal × ((1 + Rate ÷ Periods) ^ (Periods × Days ÷ 365) - 1)

If the final payment date is after the recovery date, the calculator adds daily interest on the lost earnings. It then compares that amount with the restoration of profits entered by the user.

Estimated payment due now equals principal still due, plus the correction earnings value, plus reimbursed fees.

How To Use This Calculator

Enter the plan name and participant name.
Add the principal amount that was late or unavailable.
Select the loss date and recovery date.
Enter the final payment date if earnings are paid later.
Add the annual earnings rate used for your estimate.
Select simple interest or a compounding method.
Add restoration of profits if a determinable profit exists.
Submit the form and review the result above the form.
Download the CSV or PDF report for your workpaper file.

Example Data Table

Principal	Loss Date	Recovery Date	Final Payment	Rate	Method	Use Case
$5,000.00	2026-01-15	2026-04-15	2026-04-15	6.50%	Daily	Late elective deferral deposit
$12,500.00	2025-11-01	2026-02-01	2026-03-01	5.25%	Monthly	Delayed loan repayment transfer
$2,800.00	2026-02-10	2026-05-10	2026-05-10	7.00%	Simple	Small correction estimate

About This Calculator

An IRS lost earnings calculator helps estimate earnings that may be needed when retirement plan money was deposited late or corrected. The tool is built for internal review, documentation, and early planning. It does not replace advice or an official agency calculator. It gives a clear worksheet that shows dates, days, principal, assumed rate, lost earnings, possible profit restoration, and total correction amount.

Why Lost Earnings Matter

Lost earnings try to make the plan whole. A participant may lose investment growth when deferrals, loan repayments, matching money, or other corrective amounts are not available on time. The missed period starts on the loss date. It usually ends when the principal is restored. A later final payment date can add interest on the lost earnings. This page lets you model those pieces in one place.

Advanced Inputs

The form accepts a principal amount, dates, rate, compounding method, optional profit restoration, and reimbursed fees. The rate is user supplied because plans may use different benchmarks. Some users choose a plan fund return. Others use a reasonable correction rate approved by their adviser. Daily compounding is useful for detailed estimates. Simple interest is helpful for fast checks.

Reading The Output

The result panel appears immediately below the header after submission. It shows the number of late days, earnings, interest on earnings, restoration comparison, and total deposit. If profit restoration is higher than calculated lost earnings, the calculator highlights that higher correction value in the total. The CSV button exports the same worksheet. The PDF button creates a print ready report from the result.

Compliance Reminder

Correction rules can be detailed. Dates, deposits, participant allocation, and documentation all matter. Keep payroll records, trust deposit dates, bank confirmations, and calculation support. Review the final result with a qualified retirement plan professional before making a payment. Use this calculator as a structured estimate, not as a final legal determination.

Best Use Cases

This worksheet is useful for payroll teams, plan sponsors, bookkeepers, and advisers. It can compare several scenarios before a formal filing. It also creates consistent records for small corrections. Save each calculation with the participant file, plan year folder, or correction workpaper. Clear records make later review easier and reduce confusion.

FAQs

What is lost earnings correction?

It is an estimate of investment growth a plan may have missed when money was deposited late, withheld too long, or corrected after the expected date.

Is this an official agency calculator?

No. This page provides a structured estimate only. Use official tools, plan documents, and professional guidance before making final correction payments.

Which date is the loss date?

The loss date is usually the date the money should have reached the plan. Confirm the correct date using payroll and plan records.

What is the recovery date?

The recovery date is the date the principal amount was restored or deposited. It ends the main missed earnings period.

Why enter a final payment date?

A later final payment date can add interest on lost earnings. This helps estimate delay between principal recovery and earnings payment.

What rate should I use?

Use the rate required by your correction method, adviser, plan procedure, or approved benchmark. This calculator does not choose a legal rate.

What is restoration of profits?

It is a profit earned from using plan money. When entered, the calculator compares it with lost earnings and uses the higher value.

Can I export the result?

Yes. After calculation, use the CSV button for spreadsheet records or the PDF button for a simple report.