Nobody here can give an accurate estimate over the internet.
Of course we can, the cost will be > $0. :jester:
To give the OP a bit better estimate, here's ballpark of materials cost from my service upgrade:
Panel ~200
Service Wire ~75
Weather head ~75
Grounding ~ 50
Extending Circuits that didn't reach ~ 50
Permit - $175
Now if your city is like mine, you'll be required to upgrade most of the circuits to AFCI breakers.
AFCI breakers ~ 440
So for materials alone you're looking in the $625 - 1025 range (excluding tax and markup) for a basic, no problems encountered service upgrade with < 10' from the panel to the weather head.
Now without looking at your particular situation, we don't know if you'll be required to get a larger service (many areas now require houses to have 100 amp services).
Will the PoCo drop will need to be replaced due to upsize, not meeting code, or damage? Depending on your PoCo they may eat the cost, or they may charge you.
If you have underground service, can the same conduit be used or does it need to be upsized?
My materials list only had 2 circuits that needed to be extended. We have no idea if you'll have more.
Without looking at your panel, we also don't know if anyone has done something stupid that will need to be cleaned up.
Given all the unknowns, you can see why we don't like to give estimates. That being said, you'll probably end up in the $1k - $10k range.
The best thing you can do is find 3 reputable electricians in your area and get bids from them.