How accurate are net price calculators?

<p>I've done quite a few and used those calculations to help me decide which colleges to apply to. </p>

<p>How accurate are these net price calculators? Has anyone done a net price calculator at a school, then once applied to the school and found that the actual amount offered differed greatly?</p>

<p>Any input will be greatly appreciated</p>

<p>One poster in the FA forum said the projected FA differed by $10K but the parent had a home business and the school used the Profile. FAFSA school calculators are probably the most reliable since they consider a more limited set of data.</p>