The different types of depreciation methods; straight line and double declining balance. Let's put some numbers to the scenario of switching from straight line to double declining; Company ABC has a new asset for $100,000, salvage value of $0 and a useful life of 10 years, assume the purchase date was January 1st so a full year of depreciation would be taken at December 31st. Knowing this information what would the straight line amount of depreciation calculate to and what would the double declining method amount to for the first 5 years?