Labor and the Greens have strayed further from the government while casting votes in the Senate so far this Parliament, but key crossbenchers have warmed to the Turnbull team, an analysis has found.
The figures also confirm Pauline Hanson's One Nation bloc and senators Derryn Hinch and Cory Bernardi have proven to be strong government supporters.
Government relations strategists Hawker Britton have crunched the 231 Senate divisions to this point in the 45th Parliament, with the Turnbull government winning 77 per cent of the votes.
Roughly 47 per cent of these wins have been secured with Labor Party support, while about 53 per cent have been locked in with the backing of crossbenchers.
Of key legislative measures so far this year, Labor, the Greens and independent senator Jacqui Lambie voted against tax cuts for companies with turnovers of up to $50 million as well as laws to restore the building industry watchdog.
Other senators either supported the government on the bills or did not cast votes.
Malcolm Turnbull's team found itself isolated by a Labor-sponsored bill to protect penalty rates and take-home pay, but won broad support for slashing travel perks offered to former politicians.
The opposition has been slightly less likely to support the government following the 2016 election while the Greens have been significantly less inclined.
The Nick Xenophon Team and David Leyonhjelm from the Liberal Democratic Party have been decidedly more likely to back the government, with Senator Lambie also more prone to do so.
Senator Hanson's team and Senator Hinch have sided with the government 72 per cent of the time, while Senator Bernardi has voted with the Turnbull team on 58 per cent of divisions.
The balance of power in the upper house is expected to rest with a mix of independents and minor parties for the remainder of the 45th Parliament.
The Senate will next sit when the budget is handed down in May.
How often parties voted with Turnbull government during 45th Parliament:
* Labor: 35 per cent of the time (compared to 41 per cent in the 44th Parliament);
* Greens: 11 per cent of the time (compared to 28 per cent in the 44th Parliament);
* David Leyenhjelm (LDP): 64 per cent of the time (compared to 42 per cent in the 44th Parliament);
* Nick Xenophon Team: 55 per cent of the time (compared to 22 per cent in the 44th Parliament);
* Jacqui Lambie: 27 per cent of the time (compared to 16 per cent in the 44th Parliament);
* Pauline Hanson's One Nation: 72 per cent of the time;
* Derryn Hinch: 72 per cent of the time; and
* Cory Bernardi: 58 per cent of the time.
Source: Hawker Britton
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