- Sales of aircraft parts - Effective July 1, 2014, the sales of and the storage, use, and consumption of parts used to modify or repair aircraft are exempt pursuant to sec. 77.54(5)(a)3., Wis. Stats., as affected by 2013 Act 185. 
- Services  to aircraft and aircraft parts - Effective July 1, 2014, charges for the  repair, service, alteration, fitting, cleaning, painting, coating, towing, inspection, and maintenance of any aircraft or any aircraft parts are not  subject to sales tax pursuant to sec. 77.52(2)(a)10, Wis. Stats., as amended by 2013 Act 185. 
No exemption certificates are needed for these  exemptions to apply.  A purchaser does  not need to give a retailer an exemption certificate for these purchases; and a  retailer does not need to obtain an exemption certificate from the purchaser.
  Important: Supplies for aircraft remain taxable. The exemptions  above do not apply to supplies used to operate aircraft.  Examples of items that are supplies for an  aircraft (and not parts used to modify or repair an aircraft) include engine  oil, hydraulic fluid, deicing fluids, and oxygen.
  Example 1 - Old Law: Service  Provider changes spark plugs, engine oil, and oil filter on an aircraft's engine.  Service Provider may purchase the spark  plugs, engine oil, and oil filter without tax for resale. Service Provider's  charges for the spark plugs, engine oil, oil filter, and labor are taxable  unless Service Provider accepts a fully completed exemption certificate from  the purchaser.
  Example 2 - New Law: Service Provider changes spark plugs, engine oil, and  oil filter on an aircraft's engine.  Service  Provider may purchase the spark plugs, engine oil, and oil filter without tax  for resale. Service Provider's charge for the engine oil is taxable, unless  Service Provider accepts a fully completed exemption certificate from the  purchaser, claiming a valid exemption (e.g., resale or common carrier). Engine  oil is a supply and is not exempt as a part used to modify or repair an  aircraft. Service provider's charges for the spark plugs and oil filter are exempt,  as the spark plugs and oil filter are parts used to modify or repair an  aircraft.  Service Provider's charges for  labor to replace the spark plugs and to change the engine oil and oil filter  are not subject to tax.
| Invoice: | Spark plugs (8) | $250.00 | E | 
| Labor to install spark plugs | $160.00 | E | 
| Engine oil (6 qt.) | $ 50.00 | T | 
| Labor to change engine oil | $ 50.00 | E | 
| Oil filter (1) | $ 20.00 | E | 
| Labor to install oil filter | $ 25.00 | E | 
| Subtotal | $555.00 |  | 
| Tax at 5.5% | $ 2.75 |  | 
| Total Invoice | $557.75 |  | 
June 17, 2014