A petition calling for a halt to increasing Nursing and Midwifery Council (NMC) fees has passed 100,000 signatures.
The online petition, created by mental health liaison nurse Stephen Iwasyk, could be debated in parliament because of the high response.
Earlier this year, the NMC warned that its financial situation would be “unsustainable” without a rise in the annual registration fee.
But Iwasyk’s petition called for the government to review the process through which NMC fees are decided.
An NMC statement said: "When we consulted on the registration fee in 2012, we made it clear that we needed a fee of £120 per registrant, based on our financial assumptions at the time. The government grant of £20 million enabled us to maintain the fee at £100 for two years.
"Nothing has changed since then and we believe the assumptions we made at the time remain the same, which is why we are about to consult on increasing the fee by £20.
"Nurses and midwives are not alone in paying a registration fee. All 36 of the regulated healthcare professionals, including dental nurses and doctors, pay a registration fee to their regulator. Fees for other healthcare profession regulators range from between £160 for two years to over £700 annually.”