“Machine counting is generally twice as accurate as hand-counting and a much simpler and faster process,” said Stephen Ansolabehere, a professor of government at Harvard University who has conducted research on hand-counts.
In one study in New Hampshire, he found poll workers who counted ballots by hand were off by 8%. The error rate for machine counting runs about 0.5%, Ansolabehere said.
Just how long can hand-counting delay results? Depending on jurisdiction and staffing, it could be days, weeks or even months.
In Cobb County, Georgia, after the 2020 election, a hand tally ordered by the state for just presidential votes on about 397,00 ballots took hundreds of people five days. A county election official estimated it would have taken 100 days to count every race on each ballot using the same procedures.
Proponents of hand-counting often point to countries like France, which use it more or less successfully, but that’s because they have simpler elections with just one race at a time, Ansolabehere said.
In the U.S., ballots are far more complicated, sometimes containing dozens of local, state and federal races at a time.
Hand-counting of all ballots does happen in parts of the U.S. — in some small towns in the Northeast, for example — and it’s possible in small jurisdictions, said Gowri Ramachandran, senior counsel at the Brennan Center for Justice. The Brennan Center objected to plans for an unprecedented hand-count of mail-in ballots in Nye County, Nevada, calling it a “violation of law and common practice.” The hand-count was suspended after a Nevada Supreme Court ruling in late October.
Hand tallies are also frequently used in post-election reviews, but that usually involves only a sample of ballots and is done without the time pressure of trying to report results quickly.
A recent Associated Press survey of major party secretary of state candidates in 24 states found that the vast majority opposed hand-counting ballots. Despite growing popularity of the error-prone process among some Republicans, 13 of 23 secretary of state candidates who responded said they opposed implementing a statewide hand-count of ballots instead of a machine count.