These fees — which can add up to hundreds or even thousands of dollars — get charged at every step of the system, from the courtroom, to jail, to probation. Defendants and offenders pay for their own arrest warrants, their court-ordered drug and alcohol-abuse treatment and to have their DNA samples collected. They are billed when courts need to modernize their computers. In Washington state, for example, they even get charged a fee for a jury trial — with a 12-person jury costing $250, twice the fee for a six-person jury. [...]
In Washington state, for example, there's 12 percent interest on costs in felony cases that accrues from the moment of judgment until all fines, fees, restitution and interest are paid off in full. As a result, it can be hard for someone who's poor to make that debt ever go away. One state commission found that the average amount in felony cases adds up to $2,500. If someone paid a typical amount — $10 a month — and never missed a payment, his debt would keep growing. After four years of faithful payments, the person would now owe $3,000.
It's one of those things that doesn't really register as a problem on upper middle-class policymakers, but can make one mistake or misdemeanor or miscarriage of justice dominate a poor person's life for years.