Most people are shocked to hear that I recommend spending a minimum of 10% of their overall marketing budget on SEM preparing for the last week of the year! That’s right. If you are spending $100,000 annually on (non-staffing) fundraising and development costs at least $10,000 should be ear marked in the 4th quarter for promoting your web site through search engine marketing and digital techniques. And yes, if you are spending $1 million a year on fundraising and marketing costs, then at least $100,000 should be earmarked for 4th quarter search engine marketing.