More than 12 months, but it took many years to get to that point. When I got a house, my immediate goal was to get 3-6 months emergency savings put away (down payment drained our savings).
When putting together our plan after getting a house, we did it like this:
- Put away 6 months expenses (including house payment), in liquid savings.
- Got 30-year level term life insurance. By the time the 30 years was up, we should have sufficient investments to avoid the need for it. Term is very cheap when you are young and healthy. If you wait until you can't afford to be without it, it costs a lot more.
- Got disability insurance with a 6-month waiting period. It's expensive, but the cost drops dramatically if you lengthen the waiting period. Since we had 6 months already covered in savings, we got a great policy with low cost.
Our strategy was to insure for disasters, not the survivable bumps in the road. That lowered the cost of insurance significantly. That's why we have $2500 deductible on our auto and home insurance.
Now that the emergencies were covered, we started saving for the long-term using the 401k. We scrimped to put that first 6% of salary away, but after a while we never missed it. Looking back now, that was the smartest thing we ever did - to start EARLY!