The phrase "agreed allowance" is correct and usable in written English.
It can be used in contexts where a specific allowance or limit has been mutually accepted or established by parties involved.
Example: "After much discussion, we settled on an agreed allowance for the project budget."
Alternatives: "mutually accepted allowance" or "established allowance".
He is at college and not earning, so I had agreed an allowance of £135 a month in return for which he would do some of the housework.
One has a secret trove of prewedding savings she never mentioned to her husband so she can spend beyond the jointly agreed monthly spending allowance.
By sharing their location, taking pictures, tagging friends, and telling parents what's up, kids earn points that can be exchanged for things parents have agreed to, like allowance or special privileges.
He agreed to raise allowances and services to poor elderly citizens, which would include thousands of survivors who were not in concentration camps but who were forced to flee their homes as the Nazis advanced.
RGGI states have agreed to auction their allowances in quarterly installments; the next auction is scheduled for December.
But with the king's death went the personal allowance from him agreed to at the time of the abdication.
Your college-age child could be issued a card linked to your account with a limit the size of whatever monthly allowance you've agreed on (and maybe an automatic rejection for any charges at a bar or liquor store).
He eventually agreed to a small temporary allowance for the purchase of bread whilst the price of bread remained high.
Several Ugandan officials agreed that the dissemination of allowance circulars was essential so that staff members understand their rights.
Only 63% (32/51) of the subjective measurements taken by the two observers agreed to within a 10% allowance of total lower fornix depth (figure 4).
