The 2013 standard mileage rates for use of an automobile are 56.5¢ per mile for business miles driven (an increase of 1¢ from 2012), and 24¢ per mile for medical or moving purposes (up 1¢ from 2012). The rate for rendering gratuitous services to a charitable organization remains unchanged at 14¢ per mile.

The standard mileage rate for business is based on an annual study of the fixed and variable costs of operating an automobile. The rate for medical and moving expenses is based on variable costs. Taxpayers always have the option of calculating the actual costs of using their vehicle rather than using the standard mileage rate.

A taxpayer may not use the business standard mileage rate for any vehicle after using any depreciation method under the Modified Accelerated Cost Recovery System (MACRS) or claiming a Section 179 deduction for that vehicle, or for more than four vehicles used simultaneously.

Social Security and Medicare Update

The annual inflation adjustments have been made for the various social security amounts and thresholds. So, we thought it would be a good time to update you for 2013.

The social security wage base, for computing the social security tax (OASDI only), increases to $113,700 in 2013, up from $110,100 for 2012. The additional $3,600 for 2013 represents an increase of 3.3% in the wage base. There is no taxable earnings limit for Medicare (HI only) contributions.

New for 2013, the 0.9% Medicare Surtax is imposed on wages and self-employment (SE) income in excess of the following modified adjusted gross income (MAGI) threshold amounts: $250,000 for joint filers, $125,000 for married separate filers, and $200,000 for all other taxpayers. The employer portion of the tax is not increased. This new tax is a provision of the Patient Protection and Affordable Care Act.

For social security beneficiaries under the full retirement age, the annual exempt amount increases to $15,120 in 2013 up from $14,640 in 2012. These beneficiaries will be subject to a $1 reduction in benefits for each $2 they earn in excess of $15,120 in 2013. However, in the year beneficiaries reach their full retirement age, earnings above a different annual exemption amount ($40,080 in 2013, up from $38,880 in 2012) are subject to $1 reduction in benefits for each $3 earned over this exempt amount. Social security benefits are not reduced by earned income beginning with the month the beneficiary reaches full benefit retirement age. But remember, social security benefits received may be subject to federal income tax.

Individuals may have to pay federal income taxes on up to 85% of their benefits. Inclusion within taxable income can occur if you have substantial income from wages, self-employment, interest, dividends, and other taxable income, in addition to your benefits. However, no one pays federal income tax on more than 85% of his or her benefits.

The Social Security Administration estimates the average retired worker will receive $1,261 monthly in 2013. The average monthly benefit for an aged couple where both are receiving monthly benefits is $2,048. These amounts reflect a 1.7% cost of living adjustment (COLA).

The maximum 2013 social security benefit for a worker retiring at full retirement age is $2,533 per month, up from $2,513 in 2012.

For married taxpayers, the implications of filing a joint or separate return extend beyond tax rates and the standard deduction. Like many aspects of income taxation, there is usually more than one approach to finding the optimal solution. We have listed some of the more common implications of filing either a joint or separate return. Although not an exhaustive list, it highlights several issues to consider.

Some of the implications of filing a joint return include (among others):

• The requirement that individuals who file a joint return cannot be claimed as dependents on another return. This can be important when married students are still supported by their parents.
• An individual who files a joint return is not subject to the "kiddie tax" provisions.
• Joint filers are both responsible for the tax on their joint return. Thus, nontax factors should be considered (i.e., questionable business transactions). In addition, divorced taxpayers will each be liable for tax, interest, and penalties due on a joint return filed before the divorce.
• Finally, monthly Medicare premiums can increase substantially for a couple filing jointly versus filing separately, especially for a lower-income spouse.

The implications of filing a separate return include (among others):

• If one spouse itemizes deductions, the other must also, even if total deductions are less than the standard deduction.
• Taxpayers can generally only deduct expenses they actually paid versus those paid by either.
• Credits for child care, adoption, education, and earned income are generally not available.
• If separate filers lived with their spouse during any part of the year, a greater percentage of social security benefits may be taxable because the income threshold for determining the taxable amount is reduced to zero.
• The exclusion of gain on the sale of a principal residence is limited to $250,000 (each) for separate filers versus $500,000 for a joint return.
• The $25,000 passive loss exception for actively managed rental real estate may be totally or partially lost. Also, one spouse's passive income cannot be offset by the other spouse's passive losses.
• The limit on the capital loss deduction on a separate return is $1,500 (each).
• No exclusion is allowed for interest income from Series EE bonds used for higher education expenses.
• The deduction for interest on qualified education loans is not available.
• Taxpayers filing separate federal returns typically must also file separate returns for state income tax purposes.

There you have it: the implications for married taxpayers filing jointly or separately. Please contact us to discuss the most advantageous filing status or any other tax compliance or planning issue.

Retirement Contribution and Other Limitations for 2013

The IRS has announced cost-of-living adjustments affecting the dollar limitations for retirement plans, deductions, and other items. Several of the limitations are higher for 2013 because the increase in the cost-of-living index met the statutory threshold. However, some limitations did not meet that threshold and remain unchanged from 2012.

The elective deferral (contribution) limit for employees who participate in 401(k), 403(b), most 457 plans, and the federal government's Thrift Savings Plan increased from $17,000 in 2012 to $17,500 in 2013. The catch-up contribution limit for those age 50 and over remains unchanged at $5,500.

The contribution limit for both Roth and traditional IRAs has increased $500 from 2012. You can contribute up to $5,500 ($6,500 if you are age 50 or older by year-end) to your IRA in 2013 if certain conditions are met (i.e., sufficient earned income). For married couples, the combined contribution limits are $11,000 ($5,500 each) and $13,000 ($6,500 each if both are age 50 by year-end) when a joint return is filed, provided one or both spouses had at least that much earned income.

Keep in mind that contributions to traditional IRAs may be tax-deductible, subject to specific limitations that increase for 2013. When you establish and contribute to a Roth IRA, contributions are not deductible, but withdrawals are tax-free when specific requirements are satisfied. In addition, there are no mandatory distribution rules at age 70 1/2 with a Roth IRA, and you can continue to make contributions past age 70 1/2 if you meet the earned income requirement.

The 2013 limitation for SIMPLE retirement accounts increased $500 to $12,000. However, the SIMPLE catch-up contribution for those age 50 by year-end is unchanged from 2012 at $2,500.

The 2013 contribution limit for profit-sharing, SEP, and money purchase pension plans is the lesser of (1) 25% of the employee's compensation-limited to $255,000, an increase of $5,000 from 2012 or (2) $51,000, an increase of $1,000 from 2012.

The social security wage base, for computing the social security tax (OASDI), increases to $113,700 in 2013, up from $110,100 for 2012. The additional $3,600 for 2013 represents an increase of 3.3% in the wage base.

Finally, the annual exclusion for gifts increased by $1,000 and is $14,000 in 2013.

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