Justice Secretary Humza Yousaf is to face questions from MSPs on funding for Police Scotland in the wake of discontent over the settlement.
He will attend the Justice Sub-Committee on Policing on Thursday to discuss pledges for the force in the draft budget.
Police Scotland, the Scottish Police Federation (SPF) and the Association of Scottish Police Superintendents (ASPS) have all criticised spending plans that will leave the force with a deficit in its resource budget.
Despite a proposed increase in capital funding from £35 million to £40 million, Police Scotland have said it could mean key modernisation plans such as the roll-out of mobile devices and body-worn cameras to all officers are delayed.
Some £17 million more than expected is to be invested in the resource budget but this will still leave the force with a £49 million hole – something deputy chief officer David Page said “continues the long-term trend of Police Scotland being structurally underfunded”.
Last summer, Mr Page said Police Scotland alerted the government to the need for at least £74 million in capital funding but £44.6 million was allocated in the February 6 draft budget announcement by the now Finance Secretary Kate Forbes.
In a letter to the committee, SPF general secretary Calum Steele said the capital funding would not allow the service to update its ailing IT systems.
He added: “Instead it is left pursuing totems that give the impression of being technologically significant to satisfy the Government’s need to have photo opportunities and headlines.
“In summary, the proposed budget allocation for the PSoS (Police Service of Scotland) allows the service to tread water at best.
“In doing so, however, it will exacerbate the inbuilt structural deficit in the police finances and impede operational effectiveness.
“It increases the risk to the public and interferes with service priorities as some of the funding comes with governmental priority strings attached.”
Chief Superintendent Stewart Carle, the president of the ASPS, said: “The opportunities offered by police reform have been somewhat waylaid by avoidable, structural flaws in the capital funding arrangements for policing.
“The failure to provide appropriate, capital funding settlements over that past three years is likely to drive an exponential decrease in the service’s capabilities to deliver sustainable and innovative policing that the 2026 Programme envisioned for the decade ahead as Scotland’s demographics change.”
A spokeswoman for the Scottish Government said: “Despite cuts to Scotland’s overall budget through a decade of UK austerity, the Scottish Government has ensured policing services have been maintained and improved.
“Even though the UK Government has failed to provide clarity on funding for Scotland next year, we have committed to providing an extra £42 million for Police Scotland’s annual budget.
“This represents a 3.6% rise to more than £1.2 billion, which will ensure the service can keep officer numbers at current levels, as well as maintaining and modernising its estate.”