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The Rule of 7, and Using it To Find Your Limits

In my last post  I talked about how we can remove inefficiencies in our personal Milenomics Mileage Runs.  In doing so we spoke a little about the some of the limits that are in place for certain deals: Store purchase limits, Credit card AA limits, Your Time, and Cash Flow Limits.

Today we’ll start to think about what your limits should be.  The very first thing we should do is get a feel for how many miles we think we will need this year and next.  Putting down all the possible flights we’ll be taking into a demand schedule will help us know how many miles we’ll need to get to EQM-Zero.  This number will be our yearly goal for miles.

The Rule of 7–Using it to Calculate Your Mileage Needs.

A quick, back of the napkin calculation of our mileage needs can be done using the Rule of 7. Simply put, take the number of miles you will fly–and multiply this by 7.  This will roughly give you the number of frequent flyer miles you would need to earn and use to get to EQM-Zero (in economy).  In our test case we had a 50,000 mile a year flyer needing between 292,00 and 375,000 miles– using the Rule of 7 would have put us at 350,000; pretty close. Remember this is per person, so you’ll want to do the same calculations for every person you’re earning and burning miles for.

Once you earn your goal in miles, give yourself a buffer, and some miles to upgrade your bookings to First should your want to. At this point you should start to incorporate cash back cards into your strategy whenever possible.

How Much of A Good Thing is Too Much?

We can’t control the limits a store puts on us–but we can look at how much is too much for each of us.  Remember the Milenomics addage:

Sure some cards from banks like Citi will allow you to blow right past your “credit line” and charge 2x or more than that line.  But from a bank’s perspective charging more than your maximum in one month can only look bad. Think of your credit line as the maximum risk the bank is willing to take on with you.  Even if you charge up to your limit, and pay it off–and then quickly charge up to your limit again you’re doubling the risk the bank is taking on.

What we should do is focus on increasing our credit lines–through the strategic merging of credit lines from other cards.  I outlined this in the post–“The 11 Month Itch.”  This is all part of why we don’t just close our cards–that credit line can help you reduce your % of total line you use each month to hit your goals, and make you look less risky to the bank in the process.  Charging $7k a month on a card with a $5k CL is a sure way to eventually have your wings clipped–but double that credit line by merging cards, and you’re $3k under your $10k line each month.

How Much Time Should You Be Spending on Collecting Miles?

This is a very personal one.  Only you know how much time you have to put into this.  If you’re always swamped you might not have any time for MMRs.  In that case you’d probably focus on signup bonuses and keep it at that.  On the other hand if you’ve got plenty of time, and a schedule that allows you to travel at any time you’d probably want to put more time into MMRs.

Subdivided by our Milenomics Traveler categories the following chart should help with general estimates of the amount of time you will want to use on MMRs:

Ultimately Milenomics’ goal is to help you earn the miles you need, and use them.  We need a plan because miles are not free.   Collecting miles is NOT our hobby–spending miles on travel should be our hobby.

We really don’t want to earn miles we’re not going to use.  Setting a limit on our mile earning helps us know when to stop. Remember, a mile saved and not spent is a mile wasted.


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