In later life, Sing reported chest, back, and heart pain.
His final days were spent in relative poverty and obscurity.
His elder sister or half-sister, Mary Ann Elizabeth, had died in childbirth in 1915.
In 1942, Sing moved from Miclere to Brisbane, telling his surviving sister Beatrice that it was cheaper to live there.
His final occupation was as a labourer.

Sing died alone in his room in a boarding house in West End, Brisbane, on 19 May 1943.
The cause of death was a ruptured aorta.
His only significant possessions were a hut (worth around £20) on a mining claim and a mere 5 shillings found with him in his room.
There was no sign of his medals from World War I, and his employers owed him around £6 in wages.
Sing was buried in the Lutwyche War Cemetery, in Kedron, a northern suburb of Brisbane.
His grave is now part of the lawn cemetery section of the Lutwyche Cemetery, and the inscription on his headstone reads:
AT REST
WILLIAM EDWARD (BILLY) SING (DCM)
Born Clermont Qld.
2–3–1886 — 19–5–1943
Reg.
No.
355 Australian Fifth Light Horse Regiment and later the 31st Infantry Battalion
Son of JOHN SING (bn.
SHANGHAI) and MARY ANN (nee PUGH bn.
ENGLAND)
AND MARRIED FOR A TIME TO ELIZABETH (STEWART) IN EDINBURGH 29–6–1917
A man of all trades, Pte.
Sing was awarded the Distinguished Conduct Medal for conspicuous gallantry, the Belgian Croux [sic] De Guerre and mentioned often in despatches.
Serving at Gallipoli and in France from 1915–1918, he became known as Australia's most effective marksman/sniper accounting for more than 150 of the opposing forces.

His incredible accuracy contributed greatly to the preservation of the lives of those with whom he served during a war always remembered for countless acts of valour and tragic carnage.
In later life, Sing reported chest, back, and heart pain. His final days were spent in relative poverty and obscurity. His elder sister or half-sister, Mary Ann Elizabeth, had died in childbirth in 1915. In 1942, Sing moved from Miclere to Brisbane, telling his surviving sister Beatrice that it was cheaper to live there. His final occupation was as a labourer.
Sing died alone in his room in a boarding house in West End, Brisbane, on 19 May 1943. The cause of death was a ruptured aorta. His only significant possessions were a hut (worth around £20) on a mining claim and a mere 5 shillings found with him in his room. There was no sign of his medals from World War I, and his employers owed him around £6 in wages. Sing was buried in the Lutwyche War Cemetery, in Kedron, a northern suburb of Brisbane. His grave is now part of the lawn cemetery section of the Lutwyche Cemetery, and the inscription on his headstone reads:
AT REST
WILLIAM EDWARD (BILLY) SING (DCM)
Born Clermont Qld. 2–3–1886 — 19–5–1943
Reg. No. 355 Australian Fifth Light Horse Regiment and later the 31st Infantry Battalion
Son of JOHN SING (bn. SHANGHAI) and MARY ANN (nee PUGH bn. ENGLAND)
AND MARRIED FOR A TIME TO ELIZABETH (STEWART) IN EDINBURGH 29–6–1917
A man of all trades, Pte. Sing was awarded the Distinguished Conduct Medal for conspicuous gallantry, the Belgian Croux [sic] De Guerre and mentioned often in despatches. Serving at Gallipoli and in France from 1915–1918, he became known as Australia's most effective marksman/sniper accounting for more than 150 of the opposing forces.
His incredible accuracy contributed greatly to the preservation of the lives of those with whom he served during a war always remembered for countless acts of valour and tragic carnage.
Billy Sing