Married couples with children would be an average of £4,350 better off under the Christian People's Alliance (CPA), the party has said.
Cllr Craig says children of lone parents have lower employment outcomes
Launching its manifesto, the CPA argues "stable marriages bring about stable societies" and would recognise families with marriage and childbirth grants.
The CPA also pledged to renew Christian ethos in schools and to follow an "uncompromising pro-life ethic".
Backed by Europe's Christian Democrats, the CPA is standing in nine seats.
Launching the party's plans, CPA leader and Newham councillor Alan Craig said: "Here in Newham I see the damage caused by the collapse of marriage - lowered employment prospects for children, worse health outcomes, poorer educational achievements and the repeated cycle of single parenthood."
Cllr Craig, who is not standing at the general election, said the number of children living with lone parents had gone up one quarter to 27% since Labour came to power.
The most significant cause of lone parenthood was not births to lone mothers, but the relationship breakdown over "never-married, co-habiting couples", he said.
The CPA also pledge to Make Poverty History both in Britain and in developing countries abroad.
They are also pledging to treat refugees with compassion, deal with asylum applications fairly and swiftly and to tackle the need for economic immigration.