Other staff on Caerphilly council were given 1% as part of austerity measures.
O’Sullivan, of Merthyr Tydfil, South Wales, will appear at Bristol magistrates court in April.
In the county of Glamorgan, on the border with Monmouthshire, it is the largest town in the county borough of Caerphilly and gives its name to Caerphilly cheese.
Following the Norman invasion of Wales in the late 11th century, the area of Sengenhydd remained in Welsh hands.
By the middle of the 12th century the area was under the control of the Welsh chieftain Ifor Bach (Ifor ap Meurig).
His grandson Gruffyd ap Rhys was the final Welsh lord of Sengenhydd, falling to the English nobleman Gilbert de Clare, the Red Earl, in 1266.
A council chief has been charged with misconduct in a public office after his £132,000 annual pay went up by £26,000.
Anthony O’Sullivan, 54, is said to have written a report recommending the rise.
Also reported for the same offence will be Daniel Perkins, the authority's former monitoring officer.A statement issued by Avon and Somerset Police said: "Having reviewed the police file, Nicola Haywood, head of the Crown Prosecution Service’s South West Complex Casework Unit, felt there was sufficient evidence and it was in the public interest to charge Michael Anthony O’Sullivan, aged 54, of Merthyr Tydfil; "Nigel Barnett, aged 51, of Bargoed in Mid-Glamorgan; and report for summons Daniel Perkins, aged 48, of Brynmawr, Gwent.) is a town in South Wales, at the southern end of the Rhymney Valley.In 1267 Henry III was forced to recognise Llywelyn ap Gruffudd as Prince of Wales, and by September 1268 Llywelyn had secured northern Sengenhydd.
At the 2001 Census, the town had a population of 30,388.It is a commuter town for Cardiff and Newport, 7.5 miles (12 km) and 12 miles (19 km) away respectively, and is separated from the Cardiff suburbs of Lisvane and Rhiwbina by Caerphilly mountain.