In an S-Corp, you pay yourself via a salary/dividend split. How you structure that is up to you/your CPA. Most risk-averse CPAs will suggest a 70% salary/30% dividend split, but I have spoken to other CPAs who have handled many IRS audits and say a 50/50 split is not unreasonable. YMMV.
A general rule of thumb is unless your business is making over $30,000/year (gross), it's probably not be worth it to set up your entity structure like how I said.
My annual accounting fees would be a hard metric to gauge anything by, as I have several companies and employee payroll and everything handled by one firm.
I would recommend speaking to several tax professionals/CPAs first, before settling on one. If you had a health problem, you'd speak to several specialists to hear their individual opinions, right? It sort of baffles me that others don't do the same regarding their taxes, especially considering it's often the largest expense we will have in our lives.
I hope this helps, but, as with everything, take it with a grain of salt. There is no substitute for doing your own due diligence! :D