How much does probate cost?

There may be variables (such as if both the attorney and the executor are to receive a fee), but in general there are standard probate fees in place.

California Probate Code section 10810 sets the maximum statutory fees that attorneys can charge for a probate. Higher fees can be ordered by a court for more complicated cases. The fees are four percent of the first $100,000 of the estate, three percent of the next $100,000, two percent of the next $800,000, one percent of the next $9,000,000, and one-half percent of the next $15,000,000. For estates larger than $25,000,000, the court will determine the fee for the amount that is greater than $25,000,000…

…The fee charged by the court to file a probate petition is $435, but may be slightly higher in some counties due to surcharges.  There will be an additional $435 fee when the petition for final distribution is filed.  There are other fees for publication of the probate notice, for the probate referee, and for certification of copies of court documents. (“California Probate”. California Living Trusts. http://www.ca-trusts.com/probate.html. Retrieved 5 July 2017.)