Are two wage earners really better than one?

Does it make sense for both you and your spouse to work? You might be surprised to know that adding a second salary doesn't always contribute much financially. To help determine what's best for your household, you'll need to consider the additional work-related expenses incurred as a result, such as child care and commuting costs. Use the Adding a Second Income Calculator to figure out how adding a second wage-earner to your household will affect your net income level, and help you decide whether it's worthwhile.
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Your annual income and taxes  
Annual income from one wage earner
Annual income from two wage earners
How many hours per week would the second wage earner work?
Average tax rate with just one wage earner
Average tax rate with two wage earners
Additional monthly work-related expenses  
Child care
Clothing
Dry cleaning
Commuting costs
Unreimbursed work expenses
Increased monthly lifestyle expenses 
Having two wage earners often means spending more on dining out or hiring additional services such as housecleaners. How much would these costs increase for you?
Entertainment
Dining out
Additional services
Results
Adding another salary would change your annual household income by$3,350
Additional dollars earned per hour$3.35
Additional income from second wage earner$20,000
Additional tax incurred$5,250
Additional related expenses$11,400
Net additional household income$3,350