You get a variety of additional entitlements and incentives for being deployed to Iraq. I am going to assume Iraq since entitlements are different depending on the country and/or mission you are deployed to.

First, Hostile Fire Pay/Imminent Danger Pay (HFP/IDP) and this is $225/month. This entitlement is paid as a lump sum irregardless of the total number of days in that month you are deployed. So you will get the full $225 whether you arrive in theatre on the 1st or the 30th of the month.

Second, Combat Zone Tax Exclusion (CZTE). This is a special provision allowing all enlisted pay to be considered free from withholding of Federal Income Tax. Most states follow this same rule and will not withhold taxes from your pay. You will still however continue to pay Social Security and Medicare. Commissioned Officers are capped on the amount that can be excluded from taxes, up to the amount earned by the Command Sergeant Major of the Army + HFP. Any amount earned over this in a given month is taxed. Enlisted Soldiers who earn bonuses will receive the entire amount tax free. All leave earned during this time is also tax free, and CZTE leave taken after redeployment will cause a tax refund to post on your LES. Contributions to Thrift Savings Plan are also Tax Exempt instead of Tax deferred, meaning you will not have to pay taxes on this money when you withdraw after retirement.

Third, If you have dependents you will be entitled to Family Separation Allowance of $250/month. This entitlement is paid daily so if you not deployed for that entire month you will only get a prorated amount. You must be deployed for at least 31 days before this entitlement will begin.

Forth, Hardship Duty Pay (HDP) for Iraq is $100/month. This is also an entitlement that is paid daily. Shows up as SAVE PAY on your LES.

Fifth, Assignment Incentice Pay (AIP). For units that have been considered essential and have been extended by the Secretary of Defense to serve a tour in excess of 12-month, will earn an additional $1,000/month. This is a lump sum dollar amount that will be paid irregardless of the number of days served during that month.

Sixth, Savings Deposit Program. This is a program that is available to deployed Soldiers supporting GWOT. An eligible Soldier can deposit up to $10,000 and receive a 10% interest rate on the deposit, Guaranteed. Best program available and a rate that can't be beat.

Seventh, Post Deployment and Mobilization Respite Absence (PDMRA). This is a new program which essentially authorizes the commander to grant "free" leave that will not be charged to the Soldier. It is a complicated formula that grants a certain number of days of free leave based upon how many months in the last 36 that a Soldier has been deployed. Essentially, if you are deployed over 12 months you get an extra day of nonchargeable leave for every additional month deployed.

Eighth, Special Leave Accrual (SLA). At the end of the fiscal year Servicemembers are only allowed to carryover 60 days. However, due to the high OPTEMPO of the military Congress has allowed individuals to carryover up to 120 days for two fiscal years after redeployment to protect Servicemembers from losing leave they were unable to take.

Ninth, Servicemembers who are TCS (deployed) to Iraq will not be charged for meals provided in the dining facility. This means that single Soldiers on a meal card will be able to keep all of that money normally charged for meals.

Hopefully this gives you a better idea of what a Servicemember deployed to Iraq will be entitled to.