I did 6 weeks with a goal of 1800 cals starting in november trying to "finish" out my cut. (I'd been losing weight since february).
I meticulously tracked every calorie with a goal of 200g protein and at least 15% of my cals as fat. Miserable AF, but I got through it. Packed every extra calorie I could into a whole food carb as vegetables, greens or fruits.
My lifts didn't nosedive like I was expecting, and obviously I was way hungry. What got me to stop it was the lack of visual progress. If THAT wasn't "finshing" out my cut (I was around 19% BF when I started according to my scale, and visually that was in the ballpark) it wasn't worth it to me.
Since the holidays, I've just eaten to hunger and generaly make good choices. Most of the "extra" calories I eat vs the 1800 calories are intentional consumption of carbs as grains, sugar (OMG, but YES, some sugar calories), and fruits.
I feel MUCH better, and honestly, the visual changes are coming faster since the new year, even though I've "gained" 4 lbs.
2500 cals and scale later sounds much more reasonable.