Disposable income is a type of income that shows how much money you have left after paying taxes and other mandatory expenses. It's different from national income or GDP because it includes things like remittances and social benefits. In some countries, focusing on disposable income is crucial for making economic decisions. The main difference between national income and disposable income is how money is distributed among different sectors like households, corporations, and the government. Disposable income is the maximum amount you can spend on goods and services without dipping into your savings or taking on debt.