Identify the plan before comparing contributions

Workplace plans, individual accounts, and public pensions have different contribution, withdrawal, and tax rules. Do not carry rules among Korean IRP, U.S. 401(k)/IRA, and Japanese iDeCo. The IRS contribution page explains that U.S. limits depend on plan type and plan documents; it is not authority for another country’s rules.

Read the match formula and vesting terms

If an employer offers a match, find the contribution needed to receive it, the cap, and any vesting schedule in the plan materials. The IRS matching example shows why the formula and compensation cap matter. For a fictional salary of 100 units, if you contribute 4% and the employer matches 50% of contributions up to 5% of salary, your contribution is 4 and the employer amount is 2. Actual formulas and vesting are determined by the plan documents.

In this fictional formula, eligible employee contributions are capped at 5 units (5% of salary); the employer match is capped at half of that, 2.5. If the employee instead contributes 6, the employer amount is 0.5 × min(6, 5) = 2.5, not 3. This illustrates reading a formula, not a recommended contribution rate.

Separate long-term contributions from cash you may need

Do not combine essential bills, high-cost debt, emergency savings, and retirement contributions into one target. Investor.gov explains that a defined-contribution account does not promise a fixed retirement payment and its value changes with investments. Check fees and market risk, and model near-term cash separately before increasing money in an account with withdrawal restrictions.

Keep a short annual review record

Record the currency, take-home income, current contribution, match formula, plan fees, withdrawal limits, date you checked official limits, and immediately accessible savings. Review after a job or income change and when official limits update. This worksheet does not forecast returns or certify that a retirement balance will be sufficient.

Sources

IRS: contribution rules · IRS: matching contributions · Investor.gov: employer plans