Yup, a sincere fear of hell is good enough :yup: it’s called imperfect contrition, which is fine for a sacramental confession.
To spell things out a bit:
There is
- Perfect contrition = sorrow for sin arising from the thought of the goodness of God, leading to: hatred of all our sins, a firm purpose of amendment,
- Imperfect contrition (AKA attrition); = sorrow for sin from lower motives, such as the fear of Hell)
There is also:
- Supremely appreciative perfect contrition - which is a degree of 1. which is not just real, but very intense as well. It must on no account be mistaken for 1. To do so, leads people who are truly contrite but do not feel anything, to fear they are not contrite; which can cause great anguish & scrupulosity

Contrition is in the understanding & the will; **not **in the emotions. Sorrow for sin must be real - but need not be strongly felt; because not every one has strong emotions. We do, OTOH, have to direct our wills & understandings in the way that pleases God - which includes a rejection of sin. And it is His grace that directs them as they should go; we do not have to try the impossible, & be contrite “on our own”.
“Perfect” means, not morally perfect, but, perfect in the sense of not lacking any quality necessary for a thing to be that thing. The Church is in
this sense a “perfect” society - it does not lack anything necessary for it to exist as an autonomous society; unlike a religious order, a diocese, or the family - all of which are societies within larger societies on which they depend for their existence. A “friendly society”, a trade association, a trade union, are other
imperfect societies.
So attrition is
imperfect contrition, because it lacks something perfect contrition does have: the purity of motive which makes sorrow for sin
the kind of sorrow it ought to be; for if we truly love God, we will think not of the bother that sin causes us, but of the unkindness it is to God: we will take God’s side against ourselves. Imperfect contrition -
sufficient for the remission of sin though it is - could be purer in motive than it is; instead of being weakened by concern for self.
So it is entirely possible to have perfect contrition; there is no reason to think that only very holy people can be contrite; it is not the same thing in degree as
supremely appreciative perfect contrition, but is the same in kind.
There is also:
- A sorrow for sins arising from purely selfish motives, such as does not include the intention to turn from sin and to God. Sorrow of this sort is not sufficient for remission of sins; because it does not exclude the desire to sin again - so any absolution, would be ineffective until we received grace to be contrite, however feebly. This is known as the “revival” of absolution - it is (as it were) dormant, if contrition (and so, some degree of intention to turn from sin for God’s sake) is lacking ##
Have you tried, though, to read up on whatever sinful behaviour you may be not feeling particularly repentant of and try to see it (kinda) from God’s point of view - think about WHY it might be wrong and offensive to God?
Doing little mental exercises like that helps me a lot with trying to avoid particular sins after I’ve confessed them.