Is it worth the money? When to buy products for your job

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Is it worth the money? When to buy products for your job


You’ve discovered a product that might help you with your job: perhaps a book that will teach you a new and relevant skill, or software that will speed up development.
Since you do want to write software better and faster, you are considering buying this product.
But, then again, the product costs money, and maybe that money is better spent on something else.

So should you buy the product or not?

How do you decide?

If it is worth buying, how can you convince your boss to approve the purchase?

While it’s impossible to know with certainty, a few simple heuristics can make the decision much easier.
Which heuristic to use depends on your situation, of course.
So this article will cover:

  • Buying products with your employer’s money: the “hours-saved” heuristic.
  • Buying products on your own, and why you should usually restrict this to educational products.
  • Some concrete examples to make this all clearer.
  • Saving money, including when you live in a low-income country.

Buying products as an employee

Let’s assume you’re an employee, and you’re considering buying a product that will help you do your job better or faster.
In this scenario, you basically need to compare the product’s cost to the expected savings—or additional income—your employer will gain in return.
All things being equal, if you’re spending $1000 to save $5000, that’s clearly a worthwhile purchase.

If this is a huge strategic purchase, where the cost of the product is very high and the resulting value is quite variable, that’s outside the scope of this article.
At the other extreme, sometimes the product’s value is obvious.
For example, if a product can definitely cut your cloud computing costs by 10%, just multiply the two numbers and you’ll know its value.

But much more commonly you’ll be looking at a $50 book, or a $500 software product, or a $100/month service; not a strategic purchase, and the value may not be obvious.
In this middle ground, often the easiest way to estimate the product’s value is to estimate how much time it will save you.

The “hours-saved” heuristic

Every hour you spend working as an employee costs your employer money: salary and benefits.
If a product saves at least as much money as that expense, a rational employer should be happy to pay for it.

So to figure out if a product is worth buying, you calculate the product value based on hours of work saved.
If the product’s estimated value is equal to or greater than its cost, you should buy it:

Product value = (Hours saved) × (Hourly employee cost)

We’ll get to why “equal to” is sufficient later on, but before that let’s see how you calculate the two inputs.

Hours saved

This is where you have the most uncertainty, but you don’t have to be particularly accurate.
If you need to learn a complex tool, and the documentation isn’t great, it’s pretty certain a book on the topic will save you half a day’s spinning your wheels; quite likely much more.

Hourly employee cost

If you’re an hourly contractor, you already know how much you cost.

If you’re a salaried employee, you can estimate your hourly cost to your employer with a little bit of math.
As close-enough assumptions, a full-time employees works about 2000 hours a year, and paying for benefits and taxes adds another 50% overhead.

Hourly wage = ((Annual salary) × 1.5) / 2000

A worked out example

Let’s say you’re considering buying a book that costs $50, you estimate it will save you 4 hours, and your annual salary is $100,000.

Hourly wage   = ($100,000 × 1.5) / 2,000 hours = $75/hour
Product value = $75/hour * 4 hours = $300

In this case you estimated the book’s value at $300, and it costs $50, so it’s a clear buy.
But for an educational product, even if the estimated value was only $50, the same as its cost, I would still argue you should buy the product.

The hourly wage you calculated above actually significantly underestimates the value of your time.
Your employer pays your salary in the expectation of getting some return on this cost.
So if they’re paying you $75/hour, they expect to get back quite a lot more than $75/hour back in return; profit margins in the software industry are often huge.
So your hourly wage significantly underestimates how much value your employer gets from time saved by a product.

So a break-even educational product in practice is probably a win for your employer, and at worse no damage done—and learning new skills is good for you personally.

Convincing your boss to approve a purchase

You’ve decided buying the product is the right thing for your employer; now you just need to convince your boss to approve the purchase.

Sometimes, getting approval will be trivial.
For example, many employers have a use-it-or-lose-it annual training or education budget.
If that’s the case for you, you should be able to easily buy any book you think will be helpful in any way whatsoever.
In fact, it’s often perfectly fine to buy books that aren’t even related to your work: it’s been budgeted for already, and the training budget may be partially seen as an employee benefit.

In other cases, you will have to make a more reasoned argument.
If you’ve followed the process above, however, you should have the evidence you need.
By sharing your calculation and reasoning, you should be able to make a clear, cost-vs-value argument for why buying this product is well worth your employer’s money.

Sometimes, however, you will encounter employers—or managers—who will simply refuse to spend money to help their employees be more productive.
If you find yourself in this situation, you’re working for an organization that is actively sabotaging your ability to be productive, to its own detriment.
So you may want to consider finding another job.

Spending your own money

There’s a few different situations here, which should be considered separately.

You’re working for yourself.
In this case you’re both employer and employee, so you can do a calculation similar to the above.
That is, you can figure out money saved vs. money spent.

Your employer won’t pay for an obviously-worthwhile product.
In this case you should NOT spend your own money.
I have literally had people tell me they are buying products because their employer won’t do it.
Don’t do this.
Please.

If your employer is being irrational, that’s their problem, not yours; just do things the inefficient way.
That being said, you may wish consider buying educational products if learning new skills will help you find a better job than your current one.

Buying a product to help you get a new job.
Whether this is a good idea is very situation-specific.
I would suggest that before you spend a lot of money upgrading your skills, if you know you already have reasonable skills you might be better off rewriting your resume and most importantly reaching out to people you know to help get you interviews.

Applying the process to real products

To see a more realistic example of deciding whether to buy, let’s consider a couple of my own products.

If you’re not interested, you can skip ahead to the next section.

An educational book

The Python on Docker Production Handbook ($79) covers over 70 best practices for Docker packaging for production, organized using a structured process, and specifically focusing on Python.
I would estimate that this book could save someone a day and half of research and debugging, quite possibly much more; we can say 5 hours to be on the conservative side, and take into account the time it takes to read the book.

Let’s see how you might decide to buy in different situations:

Hourly cost to employer Product value Product cost Employer should buy
$50,000 salary = $37.5/hour 37.5×5 = $187.5 $79 Yes
$100,000 salary = $75/hour 75×5 = $375 $79 Yes
$200,000 salary = $150/hour 150×5 = $750 $79 Yes

If you’re buying the book with your employer’s money, and the time savings estimate seems realistic, it’s worth buying.

If you’re an employee and you’re buying with your own money, only buy it if the new skill will help you get a better job.

Software templates

The Production-Ready Python Containers Template and the Production-Ready Conda Containers Template ($299) implement many of the Docker packaging best practices in the form of a software template.
The time savings here are even bigger because it’s already implemented, and, for example, I’ve written tests, which almost no one does for their packaging scripts.
But conservatively, keeping in mind that using the template also takes up some time, let’s say a day and half’s time saved: 12 hours.

Hourly cost to employer Product value Product cost Employer should buy
$50,000 salary = $37.5/hour 37.5×12 = $450 $299 Probably
$100,000 salary = $75/hour 75×12 = $900 $299 Yes
$200,000 salary = $150/hour 150×12 = $1,800 $299 Yes

If you’re buying the template with your employer’s money, and the time savings estimate seems realistic, it’s worth buying.

If you’re buying with your own money, you shouldn’t buy it: a software template won’t help you get a better job.

Saving money

Low-income countries

In the worked-out example above, we came to a $75/hour employee cost for someone paid $100,000 a year.
But what if you live somewhere where a more typical salary is $33,000/year?
In that case your hourly cost is $25/hour, and justifying the purchase of products gets a lot harder.
This is especially problematic for educational products, because it reduces the ability of people in low-income countries to learn new skills.

One solution is Purchasing Power Parity discounts, giving per-country discounts based on income levels.
For my own products, if you visit a product page a pop-up bar will appear at the top of the page with a discount code for specific countries.
Other independent product creators also take this approach, for example Julia Evans’ Wizard Zines.

If you find a small company that doesn’t offer PPP discounts, you can always email them and suggest it.

Spending your own money on books

Some ideas for saving money on books:

  • Buy used books; I like Alibris.
  • Buy old editions of textbooks.
    If the third edition of a book is out, the second edition will probably be a lot cheaper… and won’t necessarily be that different.
    This is especially true of some academic textbooks, where publisher will churn out editions every year where mostly just the homework exercises change.
  • If you’re buying a lot of books, you can subscribe to O’Reilly Learning platform, which gives you access to thousands of books from multiple publishers, videos, and more.
    The problem is it costs $499/year, though they have occasional sales, so you need to be buying a lot of books before it’s worth it.
    However, a professional ACM membership gives you access to O’Reilly for only $99/year, a much more reasonable price.
    Personally, I much prefer paper books when I can get them.

Go forth and buy (or not)

Assuming you’re an employee, you’re probably not spending enough money on educational products.
If spending an hour reading the right chapter in a book could save you a day’s work, buying that book and reading that chapter is what your employer should want you to do.
And from your perspective, you’ll spend less time banging your head against the wall… and those extra new skills will benefit you the next time you’re trying to get promoted or find a new job.
All of this, of course, presuming that your employer is rational and willing to pay to make you more productive.

And while it’s fair to say that I have a somewhat biased perspective, I actually do follow my own advice.
As someone who works for myself, I’ve used my own money to buy at least 14 programming books in the year before writing this article.



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