Eight years. That is the number that hangs over both clubs heading into this two-legged Scottish Premiership play-off final. St Mirren have spent eight years in the top flight and are desperate not to lose their place in it. Partick Thistle have spent eight years out of it and are equally desperate to return. Something has to give, and it starts on Thursday night at Firhill with a 20:00 BST kick-off.

How did both clubs get here?

St Mirren's season has been one of the strangest in recent Scottish football memory — extraordinary highs followed by a painful, grinding slump. Stephen Robinson's side beat Celtic to lift the League Cup in December, a landmark moment and only the club's second triumph in that competition. But while the cup exploits made the headlines, their league form quietly unravelled. Robinson departed for Aberdeen in March with St Mirren sitting tenth, and interim boss Craig McLeish could not arrest the slide. Four consecutive league defeats without a goal scored, combined with Kilmarnock finding form under Neil McCann, was enough to drop the Buddies into 11th place and the play-off. A chronic lack of goals — they finished the regular season having scored ten fewer than even Livingston below them — was the defining problem, compounded by a significant injury list throughout the campaign.

Partick Thistle's route here is far more straightforward in tone, if not entirely in execution. Mark Wilson's side pushed St Johnstone hard in the Championship title race before eventually finishing 11 points behind the champions, but a comfortable 15 points clear of third-placed Arbroath. That second-place finish gave them a place in the play-off semi-final against Scottish Cup finalists Dunfermline Athletic, whom they edged 3-2 on aggregate thanks to a second-leg home victory at Firhill to book this final.

What is the form going into the tie?

St Mirren carry the nominal status of favourites — they are the Premiership side and will have the second leg on home turf at SMISA Stadium on Monday 25 May — but the market is reluctant to give them much daylight. McLeish has won three of his ten games in interim charge, though he has pointed to performances holding up, including a win over Aberdeen and a draw with Dundee United. The 36-year-old has made no secret of his ambition to take the job on a permanent basis, whatever division the club finds themselves in next season.

Thistle will draw confidence from history at Firhill. Celtic, in the League Cup, are the only side to win there all season — a statistic Wilson and his players will be acutely aware of. In the Scottish Cup earlier this season St Mirren did beat Thistle 2-1 in Paisley, but the Jags had long spells of pressure in that game and will not feel overawed heading to the SMISA Stadium for the return.

What is at stake for both clubs?

For St Mirren, this is about more than simply avoiding relegation. It represents a reckoning with a season that delivered the club's greatest cup moment in decades while simultaneously failing in the bread-and-butter of the league. Robinson built something real over four years — three top-six finishes, a League Cup — and the current squad are trying to ensure that foundation is not dismantled by a drop into the Championship.

For Partick Thistle, Premiership football would represent the culmination of a rebuild that has quietly gathered momentum under Wilson. The pull of top-flight football in Glasgow — and the supporter numbers a derby against the Old Firm would generate — makes this more than a sporting prize.

How to watch and listen

  • First leg: Firhill, Thursday 21 May, 20:00 BST
  • Second leg: SMISA Stadium, Monday 25 May, 20:00 BST
  • Both legs live on Sky Sports
  • Live radio commentary on BBC Radio Scotland Extra and BBC Sounds from 19:00 BST each night
  • Live text coverage on the BBC Sport app and website
  • Highlights on BBC Scotland and iPlayer — Thursday at 22:30, Monday at 23:00

Two clubs, one Premiership place, and eight years of very different stories riding on ninety minutes apiece. Scottish football has served up stranger outcomes, but it would take some doing to top this one for sheer narrative weight.

Frequently asked

When is the Scottish Premiership play-off final first leg?
The first leg takes place at Firhill on Thursday 21 May 2026, kicking off at 20:00 BST. The second leg is at SMISA Stadium on Monday 25 May, also at 20:00 BST.
Where can I watch Partick Thistle v St Mirren play-off final?
Sky Sports are broadcasting both legs live. Highlights will be shown on BBC Scotland and iPlayer, with live radio commentary available on BBC Radio Scotland Extra and BBC Sounds.
Who are the favourites in the St Mirren v Partick Thistle play-off?
St Mirren are considered slight favourites as the Premiership side and with home advantage in the second leg, but the market is tight. Thistle have strong home form at Firhill and will not be without confidence heading into both matches.