What it means
Tax-advantaged accounts give valuable benefits, such as tax relief on deposits or tax-free growth. In return, governments set annual limits on how much can be paid in.
The limits are set by the tax authority and usually change over time, so you should check the current figure each year. Overcontribution often happens by accident.
A person might change jobs and receive deposits into two plans, an employer might match contributions that were not expected, or someone might simply forget what has already been paid in. Automated payments that keep running through the year are another frequent cause.
The consequences vary by country and account type. Typically, the excess is taxed at a penalty rate for every year it stays in the account, and the amount may also be taxed again when withdrawn.
Prompt correction, by withdrawing the extra money and any growth it earned, usually avoids or reduces the penalty. For finance and payroll teams, the issue is one of controls.
Payroll should track year-to-date deductions, particularly when an employee has more than one source of income, and the system should stop deductions when the limit is reached. A simple monthly report of employees close to the limit prevents most problems.
The key nuance is that limits can apply across all of your accounts of a certain type, not to each one separately. Employer and employee contributions may also be counted together, which surprises many people.
Tax authorities generally learn about the excess from statements filed by plan providers. Waiting for a letter from the authority is the expensive route, so spotting and correcting the issue yourself is nearly always better.
In practice
Real-world examples.
Example
An engineer changes employer in June and enrols in the new company's retirement plan. His old employer's automatic deductions continue for two more months by mistake. By December his total deposits are $1,800 above the annual limit, which payroll flags during a year-end check.
Example
A self-employed designer makes monthly transfers to a retirement account and then adds a large lump sum in March. She forgets the monthly transfers are still running. Her accountant spots the extra $3,000 and arranges a withdrawal before the tax return is filed.
Example
A company matches employee contributions to a health savings account. One employee also pays in personally from his own pay. The combined total exceeds the limit, so the benefits team contacts him to withdraw the excess.
Formula
Calculation
Excess contribution = total contributions in the year - annual contribution limit
Annual penalty = excess contribution x penalty rate
Suppose the annual limit for an account is $7,000 and, across two accounts, a saver pays in $9,500. Excess contribution = 9,500 - 7,000 = $2,500. If the penalty rate in that country is 6% for each year the excess remains, the annual penalty = 2,500 x 0.06 = $150. If the saver withdraws the $2,500 before the correction deadline, the penalty is usually avoided, though tax may be due on any growth.
Reading the result: the saver is $2,500 over the limit, which is 35.7% of the $7,000 allowance (2,500 / 7,000). Left alone for three years, the repeated 6% charge would cost 150 x 3 = $450 in total, and the money would also be taxed again on the way out. Withdrawing it promptly costs far less.Case study
Seen in the real world.
Larkfield Engineering is an illustrative, fictional firm with 400 staff in a retirement savings plan. A new payroll system was introduced mid-year and, because of a set-up error, it did not stop deductions when employees reached the annual limit.
Thirty-one employees ended the year over the limit by an average of $1,200, a combined excess of $37,200. HR contacted each person, and the plan administrator returned the excess and its earnings before the correction deadline.
The finance director then added a monthly exception report and a hard stop in the payroll rules. The illustrative lesson is that a small control costs far less than fixing dozens of individual errors after year end.
Watch out
Common mistakes.
- Assuming the limit applies separately to each account when it often applies across all accounts of the same type.
- Forgetting that employer contributions may count towards the same annual limit as your own payments.
- Leaving the excess in the account because it seems small, when the penalty can repeat each year.
Questions
People also ask.
Can an overcontribution be fixed?
Usually yes, by withdrawing the excess and any earnings on it before the deadline set by the tax authority.
Who is responsible, the employer or the employee?
The account holder is normally responsible for staying within the limit, though employers should have controls to reduce mistakes.
Do limits change?
Tax authorities adjust limits from time to time, so always check the figure that applies to the current tax year.
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