While not completely expiring at year-end, there are a couple of economic stimulus provisions which become less attractive after December 31, 2011 – 100% bonus depreciation and Section 179 expensing.
100% bonus depreciation, which has been in place since late 2010, reverts back to 50% bonus depreciation for 2012. Note that bonus depreciation eligibility applies to new equipment only, and the equipment must actually be placed in service by year-end to be eligible. 50% bonus depreciation is scheduled to expire December 31, 2012.
For 2011, the dollar limit on Section 179 expensing is $500,000, with a cap of $2,000,000 in eligible purchases. For 2012, Section 179 expensing is limited to $125,000, with a cap of $500,000 in eligible expenditures.