Brisbane woman Katie Anne Castel who killed husband by throwing knife eligible for parole by Christmas

A Brisbane woman who was jailed for stabbing her husband to death because she was "angry and annoyed" he got home late from work, could be out of jail by Christmas.

Katie Anne Castel, 38, admitted killing her husband Jarred Castel by throwing a 20-centimetre kitchen knife which hit him in the chest.

She first scratched her arm twice with the kitchen knife blade, saying she wanted to kill herself.

Then she threw it, hitting Mr Castel in the chest.

He died from blood loss caused by the 4cm-deep wound.

Castel's action was "deliberate and very dangerous", a Brisbane judge said in sentencing her to nine years' jail in March last year.

But Castel showed immediate remorse and pleaded guilty, Appeal Court Justice Debra Mullins said on Wednesday.

She said the jail sentence without any mitigation was manifestly excessive in the circumstances.

The successful appeal means Castel will be eligible for parole on December 20 after serving a third - rather than half - of her manslaughter sentence.

On that date it will be exactly three years since Mr Castel was fatally stabbed.

Castel was charged with the domestic violence offence of manslaughter.

The decision comes as the nation marks National Domestic Violence Remembrance Day.

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