The minimum wage in Missouri rises to $7.35 an hour on Jan. 1.

The increase is from a cost-of-living adjustment built into the state’s wage law.

The federal minimum wage will stay at $7.25 an hour next year. That’s also the minimum for most jobs in Kansas, except for tipped workers who are guaranteed a base rate of $2.13 an hour.

The Missouri Department of Labor and Industrial Relations estimates that the wage increase will add $200 a year to the income of a full-time minimum wage worker.

Nine other states also have minimum wage increases coming in 2013. The others are Arizona, Colorado, Florida, Montana, Nevada, Ohio, Oregon, Vermont and Washington.

There will be 18 states in 2013 with wage floors that are higher than the national minimum.

Advocates for wage increases note that there is no cost-of-living adjustment built into the federal wage law, so its buying power is reduced each year with inflation.

A wage of $7.25 an hour for a full-time worker amounts to about $15,000 a year.

The Fair Minimum Wage Act of 2012 was introduced in Congress this past summer but has not been acted upon. It proposes raising the federal minimum wage to $9.80 by 2014 and adjusting it annually to keep pace with inflation.

The bill also proposes raising the minimum wage for tipped workers from $2.13 an hour, where it has been since 1991, to $6.85 over five years.

After that, it would be set at 70 percent of the full minimum wage.