| | | | 2013 | | 2012 | | 2011 |
| | | | (millions of dollars) |
Income before income taxes | | | | | | |
| United States | | 9,746 | | 11,222 | | 11,511 |
| Non-U.S. | | 47,965 | | 67,504 | | 61,746 |
| | Total | | 57,711 | | 78,726 | | 73,257 |
Theoretical tax | | 20,199 | | 27,554 | | 25,640 |
Effect of equity method of accounting | | (4,874) | | (5,254) | | (5,351) |
Non-U.S. taxes in excess of theoretical U.S. tax | | 10,528 | | 8,434 | | 10,385 |
U.S. tax on non-U.S. operations | | 37 | | 89 | | 15 |
State taxes, net of federal tax benefit | | 258 | | 391 | | 312 |
Other | | (1,885) | | (169) | | 50 |
| | Total income tax expense | | 24,263 | | 31,045 | | 31,051 |
| | | | | | | | |
Effective tax rate calculation | | | | | | |
Income taxes | | 24,263 | | 31,045 | | 31,051 |
ExxonMobil share of equity company income taxes | | 6,061 | | 5,859 | | 5,603 |
| | Total income taxes | | 30,324 | | 36,904 | | 36,654 |
Net income including noncontrolling interests | | 33,448 | | 47,681 | | 42,206 |
| | Total income before taxes | | 63,772 | | 84,585 | | 78,860 |
| | | | | | | | |
Effective income tax rate | | 48% | | 44% | | 46% |