"...The Federal Retirement Thrift Investment Board has announced the 2013 elective deferral limit for regular Thrift Savings Plan contributions increased from $17,000 to $17,500 for 2013, Air Force Personnel Center officials said. The TSP catch-up plan contribution limit will remain at $5,500..
Military members can contribute any whole percentage up to 92 percent of basic pay, as long as the annual total does not exceed $17,500 for 2013. If contributing from basic pay, Airmen may also invest all or part of their bonuses, special pay, or incentive pay."