The ACT Regional Bash women's team will join their male counterparts in next year's finals after easing past the Border Bullets in the Thunder Pool 2 play-off match on Sunday.

The Aces defeated the Border Bullets by seven wickets to advance to the four-team decider at the SCG, hours before the men's team also qualified in the Plan B Regional Bash.

The ACT women lost the toss and bowled first against a strong Bullets line-up featuring a host of danger players.

The Aces were patient early as the Bullets reached 35 without loss before two quick wickets changed the complexion of the innings.

Lily Tassell was the first to go, bowled by Jade Allen for 11. The big wicket came with the addition of just one run - gun No.3 Claire Murray caught off the bowling of Clare Levings (1-12) for a third-ball duck.

The Bullets were suddenly 2-36, with opener Lisa Kuschert playing a lone hand.

She finished unbeaten on 57 from 54 balls, helping the Bullets reach 3-101 from their 20 overs.

The Bullets needed early wickets and opening bowler Ebony Hoskin (2-18) delivered.

She removed both openers to leave the Aces vulnerable at 2-17.

But Grace Lyons (38 not out) and skipper Kelly Rowlings (31) steadied the innings, combining for a match-winning 71-run partnership.

Lyons hit two boundaries in her patient 48-ball stay, while Player of the Match Rowlings struck three fours.

The Aces reached their target halfway through their 18th over for the loss of only three wickets.

They will now join Northern Inland Bolters and Coffs Coast Chargers in the finals.

Orana Outlaws will play Illawarra Flames on November 29 to decide the fourth berth.

Scores click here.