The phrase "a one time contribution" is correct and usable in written English.
It can be used when referring to a single, non-recurring donation or input, often in the context of fundraising or support.
Example: "We appreciate your generosity in making a one time contribution to our charity."
Alternatives: "a single contribution" or "a one-off donation."
If, on the other hand, you make a one-time contribution of $5,000 at age 39, by retirement age that $5,000 would only be about $40,000.
Support the Guardian's climate change and environment reporting by becoming a member or making a one-time contribution.
BA has agreed to make a one-time contribution of $1.5 billion into the pension fund, subject to acceptance of benefit changes.
For a baby born in 2000, Allan has calculated, it would take a one-time contribution of just $3,552 at birth to generate the same benefit that would require $250,000 of contributions under the current system.
Under a resolution approved today, each of the 72 unions within the federation would be asked to make a one-time contribution of $1 per member to the mobilization fund.
(It used to be free, and still is if you used earlier versions of Dashlane. The company does urge the earlier Dashlane fan to make a one-time contribution — $40 seems to be its favorite suggestion).
On March 19th, at the AFL-CIO's council meeting in Las Vegas, they approved a resolution under which each of the country's 72 unions would be asked to make a one-time contribution of $1 per member to the "mobilisation fund".
These values include a one-time contribution of 20,000 euro per farm to cover part of the investment required to adapt farm buildings for use as kindergarten facilities and, the annual contribution of 15,000 euro for management costs.
The study revealed that mean WTP ranged from a one-time contribution of $6.03 to $45.4 according to the estimation technique and the type of wetland valued, and a total value of WTP for South Carolina residents was $3.7 million.
Though a one-time contribution to even a high-yielding savings account won't get you through retirement, by the sheer virtue of compounding interest, if you were to open that account 20 years from now, you'd have significantly more money than you started with.
For instance, you could consider making an ongoing donation over a specified time period rather than a one-time contribution.
