Upvote:7
Actually, there is no guarantee you will be banned or even fined... but no guarantees you will be back any time soon even if you aren't. Your visa, if it is still valid, should in any case be revoked on the spot when exiting the Schengen area (and this would be recorded in a database).
The way this works is that sanctions for overstaying are not defined in EU law but in national law and therefore depend on the country through which you are exiting (or where you are found overstaying). In most places, you would indeed be liable for a fine but Schengen countries differ a lot in the number of bans they impose (I don't have recent data and would not want to advise going through a specific country but statistics show this clearly). Some countries only impose bans to people found guilty of a crime but not for mere immigration violations (others very much do).
But once you are out, it will be very difficult to obtain another Schengen visa and reenter the Schengen area with an history of overstay even if you haven't been formally banned. Consular agents will see that you have stayed for a number of months before and/or had your visa revoked (from the stamps in your passport but also possibly from some databases). They will be concerned that you are going to do that again and you will need to have a very strong application and a convincing account of what happened to overcome that (staying many months for tourism or some such isn't very credible and if you haven't got a proper permit, admitting you were there to work will only make matters even worse).
The person who promised you they could "arrange" a new visa under these circumstances is either lying to you or badly breaking the rules (if he or she is actually a consular officer).