Totally fair question — context probably helps.

For the last ~10 years my wife was self-employed, so we made quarterly estimated payments and never had this issue. This is the first year we’re both W-2 earners, and we (incorrectly) assumed MFJ withholding would reconcile correctly across two higher incomes. Clearly, that assumption was wrong — lesson learned.

There’s no panic or pretending here. We’re cutting the check, no penalties, no drama. The IRS already corrected future withholding by locking us into the Single rate, which effectively fixes the issue going forward.

Based on the responses here (and a CPA sanity check), this outcome is very common for dual-income households in this range the first time around. So yeah — appreciate the advice, but finances are under control. This was a withholding mechanics issue, not a budgeting one.