OHA
Overseas Housing Allowance, or OHA may be given instead of BAH when a member is stationed outside the United States. Overseas Housing Allowance (OHA) which is similar, but has some significant differences. In OHA, each country, and each region in a country have a cap on a per month basis as to what the military will pay for housing. OHA is the exact amount of monthly rent in the local currency (so the exchange rate is taken into consideration each month as the member is paid in US dollars) up to the cap.
OHA may also be paid in certain circumstances if the dependents are living overseas, for example if a member is deployed, and the dependents stay in a country outside of the US.
Frequently a "utility allowance" also accompanies OHA. This is usually a flat rate given to the member to cover the cost of utilities, regardless of the actual amount.
Read more about this topic: Basic Allowance For Housing