There is a free 1099 calculator at DinkyTown.net and Efile.com. The online calculator can be used by those who are self-employed, those who are employed by a church and those who own a farm to calculate the self-employment taxes they owe, according to DinkyTown.net.
Users must click on the Start The Tax Estimator Now button on Efile.com to begin calculating the taxes they owe. The site requires users to fill information such as marital status, exemptions and number of dependents.
On DinkyTown.net, there is a list of definitions that explains the meanings of terms such as net farm income or loss, net business income or loss and church employee income.