North Cumbria Integrated Care Trust (NCIC) earned more than £1 million in car parking fees from both patients and staff in the year to March.
A leading trade union has called for an end to the practice saying that health workers need more 'support'.
NCIC earnt £649,000 from parking for staff and £397,000 for patients and visitors according to data from NHS England
The data shows the trust also spent £76,000 on parking services over the same period.
Across England, NHS trusts made a net revenue of £165.6m from parking charges. This was from a total of £242.8m in car parking fees, after spending £77.2m to run parking services.
This included £70.5m charged to NHS staff.
NCIC have said that people visiting patients towards the end of their life don't have to pay to park alongside cancer patients and parents with children on the children's ward.
The trust also said staff on night shifts don't have to pay and that money earnt through parking charges was invested back into the trust.
Despite NCIC's efforts, GMB, a union which represents thousands of NHS staff, said that workers deserve better.
Union Secretary, Rachel Harrison, said NHS workers have suffered "rocketing workloads, chronic understaffing and the fallout from a global pandemic".
She said: "Health workers are on their knees - they need help and support. Charging them to park is kicking them while they are down."
GMB is calling on the Government and NHS employers to scrap staff car parking charges.
The figures also show there were 3,628 available parking spaces across NCIC
Patricia Marquis, from the Royal College of Nurses, said: "Nursing staff provide a vital public service and often work unsocial hours and in places where public transport is not always possible.
"They shouldn't be forced to spend a significant portion of their wages just to park at work."
She added all staff should be able to access "safe, sustainable and affordable" transport, and urged employers and local authorities to work together on the issue.
NHS England said revenue from parking is put towards other services provided by trusts.
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A spokesperson for NCIC said: "In line with the vast majority of NHS trusts we have parking charges for staff and visitors.
"There are concessions for visitors who are visiting patients at the end of their life, for patients with a regular outpatient appointments, cancer patients, and for parents visiting children on our children's wards. There is also free parking for blue badge holders, and staff working overnight.
"NCIC does not make a profit. The revenue for parking received by the Trust is spent like all other Trust income on the care of patients, as well as car park facilities."