Final answer:
After-tax real return is calculated by first finding the after-tax nominal return and then adjusting it for inflation. For a nominal interest rate of 4%, a tax rate of 20%, and an inflation rate of 1%, the after-tax real return is 2.2%.
Step-by-step explanation:
To compute the after-tax real return, we first need to calculate the nominal return after taxes and then adjust it for inflation. With a nominal interest rate of 4%, a tax rate of 20%, and an inflation rate of 1%, the calculation would be as follows:
- Calculate the after-tax nominal return: 4% nominal interest x (1 - 0.20 tax rate) = 3.2% after-tax nominal return.
- Calculate the real return: 3.2% after-tax nominal return - 1% inflation rate = 2.2% after-tax real return.
Therefore, an investor will effectively earn a 2.2% return on their investment after considering both taxes and inflation. It is important to note that U.S. tax laws tax the nominal gain, not accounting for inflation, which can lead to taxing on money that effectively has not gained any real value.