The phrase "a significant sum to" is correct and usable in written English.
It can be used when discussing a large amount of money in relation to a specific context or purpose.
Example: "The donation was a significant sum to support the local charity's initiatives."
Alternatives: "a considerable amount to" or "a large sum to".
With the average house price now at the £230,000 mark, homeowners will have a significant sum to leave.
Three publishers expressed interest in publishing the book, but Random House imprint Vintage Classics triumphed, paying a "significant" sum to acquire rights in Titus Awakes.
It emerged on Wednesday that Goldman Sachs, the investment bank, has given a significant sum to the campaign to stay in the EU.
One aide did say that Mr. Clinton has been offered a significant sum to conduct a farewell interview with a foreign television station.
He could have decided to donate a significant sum to some well-established charity organization, one that appears to be doing God's work in eradicating global poverty.
They wound up paying a significant sum to some of their neighbors for blocking their light, and another to the owner of a nearby parking garage they needed to build scaffolding over for the duration of construction.
In the contest against Connolly, Perkins acknowledges that he will have to raise a significant sum — at least $2 million, if recent races are a guide — and he got a decent start by raising $120,000 in the second quarter of the year.
He has received £3.5bn of taxpayers' money to keep the network running until the end of March and will apply for a further "very significant sum" to cover the next six-month period up until September.
Though the study was commissioned by and focused solely on the Pequots, Fred Carstensen, the report's director, said Mohegan Sun contributed a lesser but still significant sum to the state's economy.
Even though American Giant had already spent considerable amounts of money on its photography, it decided to invest a significant sum, $35,000, to redo the shots.
As an independent operation, the group spent $240,000 to defeat Reyes in the primary election, a significant sum compared to the $616,205 spent by O'Rourke's campaign in that election cycle.
