STEP-BY-STEP ANSWER:
Step 1: Determine the initial cost of the intangible asset at acquisition.
Step 2: Identify any residual value if applicable; typically, many intangible assets have no residual value.
Step 3: Establish the useful life of the asset over which the cost will be amortized.
Step 4: Subtract any residual value from the initial cost, if applicable.
Step 5: Divide the resulting amount by the useful life to obtain the annual amortization expense.
Final Answer: The annual amortization expense is equal to (Cost - Residual Value) divided by the Useful Life.