Even if the requirements explained earlier under What Property Qualifies? are met, you cannot elect the section 179 deduction for the following property.
• Certain property you lease to others (if you are a non-corporate lessor). THAT'S YOU. HOWEVER THERE IS AN EXCEPTION
Generally, you cannot claim a section 179 deduction based on the cost of property you lease to someone else. This rule does not apply to corporations. However, you can claim a section 179 deduction for the cost of the following property.
1. Property you manufacture or produce and lease to others.
2. Property you purchase and lease to others if both the following tests are met.
a. The term of the lease (including options to renew) is less than 50% of the property's class life.
b. For the first 12 months after the property is transferred to the lessee, the total business deductions you are allowed on the property (other than rents and reimbursed amounts) are more than 15% of the rental income from the property.
179 is limited to business income so if the 179 deduction would result in a business loss the "loss" amount isn't deductible but must be carryforward.
having pointed those things out about section 179, there is another possibility that is not subject to the same constraints as 179. That's bonus depreciation under IRC 168(k)
you should read IRS PUB 946 starting on page 23
HTTPs://www.irs.gov/forms-pubs/about-publication-946
sometimes taking the maximum depreciation in the 1st year is not the best from a tax standpoint. your income goes way down that year but then you have no depreciation deductions in future years to offset the income which usually results in paying more taxes in subsequent years than you saved in the 1st year
