My $.02:

By task for those tasks that have a market task rate (e.g., get the going pet grooming rates). You can use those rates to negotiate. Just deduct a proper amount for the stuff you're paying for (e.g., hampoo, blower, hot water) that the market would supply (i.e., groomer's business). For other miscellaneous tasks, by the hour but limit how many hours per day/week maximum the assistant can spend (for budget and protection purposes). Compare the hourly rate to the market task rate (less expenses) divided by the estimated time to complete. Go with the lowest total cost between the two.

You should know how long it generally takes you to do those miscellaneous tasks so you can set a reasonable limit. (http://www.derbyservice.com/packages.asp#1). As for the hourly rate (or any of the above), you can also check online for how much personal assistants of this kind charge in your area. Also think about a drop in the rate for the more hours and tasks the assistant does for you (volume discount).

Also, specify in writing the terms including that the assistant is an independent contractor and not your employee (FICA, unemployment etc.) Be sure the assistant is bonded and check your own insurance policy (better yet, call your agent about this issue).

Here are some examples: http://www.trueharterrands.com/pa-services.php http://www.the25thhourconcierge.com/RatesSpecials.html http://www.coastalpersonalassistant.com/fees.html

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