An annual inspection on a Cirrus SR22 is typically flat-rated between 20 and 25 hours, with 23 being about average. The shop rate varies widely between Service Centers based predominantly on location. (For example, we see hourly rates as low as $65/hour in Texas, and as high as $120 in the San Francisco Bay area.)
Of course, the flat-rate inspection does not include repair of discrepancies, nor scheduled preventive maintenance. Cirrus recommends an extensive list of scheduled preventive maintenance, and owners that choose to comply with Cirrus recommendations wind up spending quite a lot for maintenance. However, none of these recommendations are compulsory, and owners who are sophisticated in their maintenance decision making (or who hire a professional maintenance manager like my firm SAMM) reject many of these scheduled maintenance tasks in favor of on-condition maintenance.
Our experience is that a five-year-old SR22 almost always provokes an estimate of $10,000 at annual inspection. A sophisticated owner who makes good decisions on what items to decline will bring the cost of that annual down to between $2,500 and $5,000 depending on exactly what discrepancies are uncovered during the inspection and whether the SC’s hourly shop rate is at the top or bottom of the range.
The SR22 does have certain mandatory maintenance requirements that do not apply to a CAR 3 aircraft like your Skylane. For example, the CAPS system has compulsory airworthiness limitations requiring replacement of reefing line cutters every 6 years (around $1,000 in parts plus 1-2 hours of labor), and replacement of the rocket and canopy every 10 years (~$10,000, or $1,000 per year). Additional airworthiness limitations apply to aircraft that have inflatable seatbelt airbags.
In my opinion, comparing maintenance costs of a Cirrus SR22 to that of a Skylane makes about as much sense as comparing maintenance costs of a Cessna P210 to that of a Skylane. The SR22 is a vastly more capable, more sophisticated airplane than the Skylane, so it’s only reasonable to expect that it costs more to maintain. An SR22 whose maintenance is managed optimally costs roughly the same to maintain as a Bonanza. (Very roughly!)
I’m a Skylane lover…my first airplane was a Skylane, and I still believe that the Skylane is the ideal first airplane for a new owner. I’m also a SR22 lover, but I don’t think an SR22 is a good choice for someone who is new to aircraft ownership – when you make your inevitable newbie-owner mistakes, the tuition is too high. (I do think the SR22 is a great second airplane.)