I'm not at all interested playing this season anymore. But I don't want to lose my hard earned diamond border either.
Haven't played in 20 days now, how long 'til I start decaying? I guess I have to play 1 game soon.
I heard it's like a month max before you start slowly losing LP.
If you're already low LP, you start losing divisions even more slowly.
Here's the excert from the FAQ in the client:
What happens if I stop playing ranked for awhile?
After 28 days of inactivity in standard tiers a couple things will happen. First, you'll be hidden from the standings in your League, and you may lose League Points depending on your current tier. Every seven days thereafter, you'll lose LP again until you play a match in that queue. In apex tiers, to ensure only the top active players are being showcased the number of days before becoming inactive is 10. LP losses will be incurred each day of inactivity after.
The number of LP lost following each period of decay is as follows:
Master & Challenger: 250 Diamond: 50 Platinum: 35
If you fall below zero LP as a result of decay, you'll be placed into the next lowest division. If you're already in Division V of your league, you'll fall into a new league in the next tier down.
30 days by 30 days of no ranked games, you will begin to decay you will not fall from diamond 5 to plat 1 until you've lost substantial mmr or let it decay for awhile past 30 days just do 1-2 games a month and you will be fine
