After October first, the State of Oregon will stop paying collection fees on back taxes. Instead, taxpayers who owe the money will get that amount added to the bill. Rosemary Hardin, with the Department of Revenue says it can be a lot of money. On $100, that's an additional $67 in fees. 200,000 Oregonians owe back taxes. You can avoid the extra costs by paying your taxes by October first.