Hi Roguejim, Welcome to the Forum!
Sounds like you plan to retire with 27-28 years of service under FERS. So you get (1) social Security, (2) FERS annuity plus (3) your TSP. I've heard it said folks should determine how much is needed per year to live, subtract estimated SS and FERS annuity, to then leave the amount needed from TSP or other investments and savings. Also, need to use IRS tables to look at longevity /life expectancy tables.
If one is expected to live 25 years after retirement (into 80s), which is more common now, you should divide that into the TSP savings to give you idea of how much you'll get per year. So, thats about $4,000 per year for every $100K you have saved.
So you would be drawing about $12,000 per year from TSP based on the $300k saved to date. That's $1k per month just from TSP with current balance.
You'd just need to consider the risk you are willing to take during the next 6 years before you retire.
I tend to believe that buy and hold with mix of G and C and S fund (per your acceptable level of risk), or premium services, is best unless you plan to spend a lot of time managing your account, keeping up with the market and learning as much as possible about investing in the market.
Monitoring the market and managing your own money is not for the weak of heart, as I have been learning. I am now within 5 years of retirement and it gets harder to see market drops. But quite honestly staying in G fund will not provide much growth...then again its very low risk! It comes down to what you think is best for you. Tough decision.
P.S. i don't like the L funds because I think the allocations put too much in the I fund and overall too much in the G fund. I would consider allocation like that of tge L2020 but take the % from the I fund and put it tiwards the S fund instead. But that's just me!
Best wishes !!!!!!!! :smile:
Link to L fund info sheet
https://www.tsp.gov/PDF/formspubs/FundsL.pdf