Tire shop invoice software

A tire or repair shop invoice is four numbers pretending to be one: parts at your cost with your markup on them, the hours you sold at your door rate, shop supplies and disposal, and sales tax on the parts only. This builder works all four from what you type and shows the gross profit on the parts separately, because that is the number a matrix is supposed to protect and the one a hand written ticket quietly loses.

Parts margin is the number a hand written ticket loses

On most repair tickets the labor is close to fixed by the hours you sold, so the money that moves is the markup on parts. A ticket written by hand almost always shows the parts at the price you charged and nothing about what they cost, which means nobody can tell afterwards whether the matrix held. This builder keeps cost and markup as separate inputs and prints the gross profit on parts as its own line, so the answer exists at the moment you write the ticket rather than at the end of the month.

Shop supplies and disposal are not rounding

A percentage of labor for shop supplies and a flat disposal fee look trivial on one invoice and are the difference between a profitable oil change and a free one across a year. Both are inputs here rather than assumptions, because the right number depends on what you actually consume and what your waste hauler charges. Several states regulate how these can be presented to a customer, so put your own figure in and check the presentation rules where you are.

Sales tax usually follows the parts, not the labor

Most states tax tangible parts and treat repair labor as exempt, a few tax both, and some tax labor only when it is part of a fabrication. The builder applies the rate you enter to the parts line alone, which matches the common case. Where your state taxes labor as well, enter the rate that produces the right total for your mix rather than trying to make one field do two jobs, and check the current rule with your state's revenue department.