
401(k) Safe Harbor Plan Design: How Small Employers Bypass ADP and ACP Nondiscrimination Testing and Avoid Top-Heavy Minimums
A practical guide for small employers comparing the three IRS safe harbor 401(k) formulas — basic match, enhanced match, and 3% nonelective — alongside QACA auto-enrollment rules, SECURE 2.0 startup and contribution tax credits, notice deadlines, and the vesting and bookkeeping details that decide whether ADP, ACP, and top-heavy testing actually go away.










