The official beginning of tax season sent Americans online in droves, driving the tax category up 202 percent to more than 23 mln visitors, making it the top-gaining category in January. IRS.gov led the category with 12.5 mln visitors (up 181%), followed by TaxACT with 5.8 mln visitors (up more than 1,000%), and H&R Block with 5.3 mln visitors (up 312%).
| Site | December 2007 | January 2008 | Growth, MTM | Rank |
| Total Audience | 183,619 | 184,239 | 0 | N/A |
| TaxACT | 421 | 5,803 | 1,277 | 182 |
| H&R Block | 1,294 | 5,337 | 312 | 201 |
| IRS.GOV | 4,442 | 12,495 | 181 | 82 |
| Kayak.com | 3,234 | 6,871 | 112 | 150 |
| Intuit | 7,096 | 14,979 | 111 | 64 |
| Weight Watchers | 2,287 | 4,552 | 99 | 240 |
| PCH.COM | 4,900 | 8,953 | 83 | 108 |
| CareerBuilder | 13,914 | 24,752 | 78 | 27 |
| Job.com | 3,567 | 5,654 | 59 | 190 |
| ED.GOV | 4,314 | 6,828 | 58 | 152 |
| Source: comScore | ||||