The HSE has spent over €126m on laboratory analysis of Covid-19 samples during the first six months of the outbreak.
The average cost of processing a test was around €150.
Figures released under Freedom of Information reveal that up to the end of August, the HSE spent €126,614,077 on laboratory services for the Covid-19 testing campaign.
By that point, over 841,000 tests had been completed.
During August the lab work was costing €1m per day on average.
However, that figure does not include the cost of running swabbing centres, contact tracing, or a referral by a GP.
In June, officials told TDs and Senators that running its testing system at maximum capacity for the rest of the year - 15,000 per day - would run up a bill of €450m by the end of the year.
They now believe that figure will be around €400m, but that depends on how quickly the second wave tails off.