Balance on October 20, 2026
$12,842
$842 added to $12,000 of tax since April 15, 2026; interest now runs at about $2 a day.
| Unpaid tax | $12,000 |
| Failure to file penalty | $0 |
| Failure to pay penalty, 7 months | $420 |
| Interest, compounded daily | $422 |
Penalties of IRC 6651 and interest at each quarter's underpayment rate (7 % in the fourth quarter of 2026). Estimate, not tax advice.
| Month ending | Penalties | Interest | Balance |
|---|---|---|---|
| May 15, 2026 | $60 | $60 | $12,120 |
| June 15, 2026 | $120 | $122 | $12,242 |
| July 15, 2026 | $180 | $187 | $12,367 |
| August 15, 2026 | $240 | $261 | $12,501 |
| September 15, 2026 | $300 | $336 | $12,636 |
| October 15, 2026 | $360 | $410 | $12,770 |
| October 20, 2026 | $420 | $422 | $12,842 |