Software maintenance is an important part of the software development activity, but it is also the less discussed. A recent poll seems to show that the part of maintenance in software development budget is going down. Why? Question: what percentage of your software development budget is devoted to maintenance. Maintenance is defined as process of correcting, enhancing and optimising deployed software. 25% or less of the budget ...........37% 26% to 50% of the budget ............27% 51% to 75% of the budget ............24% more than 75% of the budget .........12% Number of participants: 433 The annual maintenance costs in the US are estimated at over $ 70 billion. According to the different studies produced in the last century, maintenance should cost between 66% and 90% of the total life cycle costs. We can see in our survey that the majority of the participants estimate their maintenance budget below the 50% threshold. If we accept that these numbers are representative of a modified situation, many hypothesis can be made to explain it. Go to http://www.methodsandtools.com/dynpoll/oldpoll.php?Maintenance to see these reasons and get more resources on software maintenance.