SMEs’ Single Book Keeping Scheme” is part of the Thai government’s measures to strengthen SMEs access to finance with a single set of accounts and encourage them to comply with the tax laws. SMEs that have registered capital of no more than 5 million Baht and income of no more than 30 million Baht who have registered with the Revenue Department since 15 January, 2016, till 15 March, 2016, must inform the Revenue Department that they will open an account that shows their income and financial budget to be in line with the real business situation (single account). The Revenue Department will not inspect any retrospective tax even if it is tax of a juristic entity, VAT, business tax, or revenue stamp, so in order to have knowledge and understanding relating to the correct process of bookkeeping, as well as actually work and draft an appropriate investment plan for the business.