Free tools for contractors

Small calculators for the sums that decide whether a tender is worth taking. They run entirely in your browser — nothing you type is sent anywhere or saved.

• Tender cost calculator — EMD, performance security and retention
  Work out what a government tender ties up before it pays you: EMD, performance security, retention at its peak, and what a bank guarantee costs instead. Free, runs in your browser.
• Compare your rates with the DSR or state schedule of rates
  Check what your quoted percentage means against the department's estimate, apply the cost index, and see whether your biggest items cover what they actually cost you. Free, runs in your browser.