No, just 20% of your job when we talk about fixed price, and same for hourly but after some week it's been 10%

You need connects to send proposals in upwork, between 1-6 connect for each proposal,

Here is what Upwork has said about that so far:
Small jobs (anything that is $49 or less) will cost 2 Connects ($0.30)
Medium jobs (anywhere from $50 to $599) will cost 4 Connects ($0.60)
Large Jobs (over $600) will cost 6 Connects ($0.90)

Prices for connects
10 connect for $1.50
20 connect for $3
40 connect for $6
60 connect for $9
80 connect for $12

When a new freelancer successfully registers on Upwork, they'll receive 80 Connects to start building relationships.
They'll also be rewarded with more Connects for taking the Upwork Readiness Test and earning a Rising Talent badge.

Each month, freelancers will get FREE Connects to find their next opportunity! Freelancer Basic accounts receive 10 free Connects each month, and Freelancer Plus accounts receive 80 free Connects each month.

Awarding 10 connects for each interview won: when freelancers and agencies submit a proposal, win an interview, and respond, they can earn up to 50 connects every 7 days
Increasing the Connects that new talent get from 20 to 40, PLUS the chance to win another 40 for passing the Upwork Readiness Test
Increasing the monthly free Connects on the Freelancer Basic plan from 0 to 10
Increasing the monthly Connects on the Freelancer Plus plan from 70 to 80 (that's 10 FREE Connects!)
Increasing the Freelancer Basic and Plus Connects Rollover Limit from 140 to 200
If you buy freelancer plus, you also Engage and apply with 80 Connects per month (70 included with your plan purchase, and 10 FREE from Upwork!)

20% for the first $500 with a single client.
10% for total billings between $500.01 and $10,000.
5% for billings that exceed $10,000.
These are the fees per project,