This is just some general information. I hope it can help you
The amount of money a hospital pays to the agency is referred to as the Bill Rate. The agency will calculate and subtract their costs, overhead and profit margin from the bill rate and then, with the difference, make a detailed offer to the traveler. Offers should include the specific dates and location of the contract, details of pay, housing or stipend amounts, insurance or other benefits as the agency may choose to include in their offer package. Agencies' costs and profit margins vary widely. This will directly affect the amount of money available to package into an offer for the traveler.
Further, different agencies will package the same amount of money quite differently. One agency may offer luxury housing, high end health insurance, license reimbursement, a rental car and many other perks. Another may not offer health insurance, may provide low quality housing or even no housing at all. It is important to understand that there is no such thing as free housing or other free benefits. All of these things have a cost. Since all costs and compensation must come out of the bill rate, a traveler working for an agency offering a high level of "extras" will probably be paid lower wages than one working for an agency that offers few or no non-wage perks.
Salary averages are widely variable. Salary may change based on the location, the need of the hospital or nursing unit, the perceived staffing needs by the unit manager and the ability of the traveler to negotiate. Great differences are seen in various locations of the country. Generally, areas in the southern United States pay less than areas in the north or west. Areas where housing costs are high can impact salary ranges, as well. Travel nursing positions often can pay more than stationary nurse jobs depending on locations and demand.
There may be tax benefits, commonly called "Tax Advantage" or "Per Diem" pay, if the traveler maintains a "tax home" while working and living away from that home. The tax-free reimbursement covers meal and incidentals as well as lodging. Some companies only offer the tax free lodging component, while others provide both. A "tax home" is a dwelling that you live in, maintain and return to between assignments. You must have living expenses at your tax home that you duplicate because your business requires you to be away from that home.
Tax-free money is a complicated subject and many travel companies have little understanding of the tax implications for the traveler, often encouraging travelers who do not qualify to take it, leaving them at risk in an IRS audit. It is highly advisable to consult a travel tax expert prior to accepting tax free money.