I'll do a quick and dirty one for ya. That loan amount is actually similar to mine, I am expecting to do it in 5 years. Disclaimer: I am single and am pretty flexible with location after dental school.
$200k loan paid over 5 years at 6.8%: total loan repayment = $268,000
Average salary over the 5 years would probably be around $140k (I would consider this maybe a slightly conservative figure, at least for my area)
After taxes that's about ~$90k depending on state and a few other things
Live off of $30k post-tax, pay $60k towards loans for a little under 5 years
I like that calculation, especially how you emphasized the importance of flexibility after dental school.
My calculation assumes the following things:
You take out 50K/yr for loans (evenly distributed for all four years of dental school)
You have interest rate of 7%, compounding interest. Your loans start compounding/accruing interest each year.
You do an AEGD after dental school
You are open to the idea of working with the underserved in community health centers
That means that your total loan liability upon graduation is determined by the following calculations
Loans at end of Year 1: 50K
Loans at end of Year 2: 50K*1.07 +50K= $103,500
Loans at end of Year 3: $103,500* 1.07 + 50K = $160,745
Loans at end of Year 4: $160,745 * 1.07 +50K=$221,997.15
Total at end of four years of dental school = $221,997.15
Here's my calculation/plan for you- this plan lets you pay off the loans in THREE years (Actually four since AEGD is not really a repayment year).
Year 1: AEGD; You earn just enough ($50K) to live off of and pay the interest ($15K) to keep the loan from growing.
Year 2: Sign a 2-year contract with the NHSC to work in a health center that is in a health professional shortage area. Get 50K upfront, tax free for loans. Salary is negotiated separately with the center. With AEGD, you could estimate this to be 130K + benefits (I had made a thread about this months ago...and multiple dentists confirmed this estimate). Post-tax is about 87K. Live off of 27K (doable in many parts of the country), and throw 60K at your loans. So, this year you knock out 60+50= 110K loans. So, you have 222K-110K= 112K left. Almost HALFWAY THERE!
Year 3: 112K loans left. But wait, it grew at 7%, so it's actually 120K. Knock out another 60K this year.
Year 4. 60K left with interest becomes 64.2K in loans. After finishing your initial 2 year obligation with the NHSC, you can renew for one-year increments with 30K/yr award. So, you pay only 34.2K post-tax, and work at the center for one year (this year), and you've paid off your loans.
Congrats! You're done!