Automating Contributions

Set It Once, Let It Run

You've picked your brokerage, chosen your accounts, and decided on a simple portfolio.

Now comes the part that makes everything actually work: automation.

The difference between a plan that works and a plan that sits on paper is whether money actually moves from your paycheck into investments—consistently, automatically, without you having to think about it every week.

This page is about how to set that up so the system runs even when you're busy, tired, or not thinking about money at all.

1. Why automation is non-negotiable

Manual investing sounds reasonable at first:

  • "I'll just move money when I have extra"
  • "I'll invest when the market looks good"
  • "I'll remember to log in and buy every month"

In practice, this falls apart fast:

  • Life gets busy – you forget
  • The market feels "too high" – you hesitate
  • You see something you want to buy – the investing money disappears

Automation fixes all of this:

  • Money moves before you can spend it
  • Investments buy regardless of how the market "feels"
  • The system runs whether you're motivated or not

The people who build wealth aren't the ones with perfect plans. They're the ones whose plans actually run in the background for 20-30 years.

2. The three layers of investment automation

You want to automate at three levels:

  1. Payroll contributions (401(k), 403(b), TSP)
  2. Scheduled transfers (bank to brokerage)
  3. Automatic investing (cash to funds)

Let's break down each one.

3. Layer 1: Automating 401(k) contributions

This is the easiest automation to set up because it happens through payroll.

How it works:

  1. Log into your employer's 401(k) system (Fidelity, Vanguard, Empower, etc.)
  2. Choose your contribution percentage or dollar amount
  3. Select which funds to invest in (or use a target date fund)
  4. Save your settings

From that point forward:

  • Money comes out of every paycheck before you see it
  • It automatically buys your chosen funds
  • You never have to log in unless you want to make changes

What percentage to choose:

  • Minimum: enough to get the full match (usually 3-6%)
  • Ideal: 10-15% if you can afford it
  • Aggressive: 15-20%+ if you're pushing for early retirement

You can always adjust, but starting with "at least the match" is non-negotiable—that's free money.

4. Layer 2: Automating IRA transfers (bank → brokerage)

For Roth IRAs and Traditional IRAs, the money flow is different. You need to move cash from your bank to your brokerage first, then invest it.

Setting up automatic transfers:

  1. Log into your brokerage (Fidelity, Schwab, Vanguard, etc.)
  2. Link your bank account if you haven't already
  3. Set up a recurring transfer (ACH pull)
    • Example: $500 on the 5th of every month from checking to Roth IRA
  4. Most brokerages let you set this up once and it repeats automatically

How to decide the amount:

  • 2024 IRA contribution limit: $7,000/year ($583/month)
  • If you can't do the full $583, start with $200, $300, $400—whatever fits
  • You can always increase it later as income grows or debt drops

Timing tip:

  • Schedule it a few days after your paycheck hits
  • This ensures the money is there and doesn't bounce

5. Layer 3: Automating the actual investing (cash → funds)

Just because money is in your brokerage account doesn't mean it's invested. Cash sitting there earns almost nothing and doesn't grow.

You need to set it to automatically buy your funds.

How to set up automatic investing:

Option 1: Automatic Investment Plans (most brokerages)

  • Log into your brokerage
  • Go to "Automatic Investments" or "Recurring Investments"
  • Choose the fund (e.g., FSKAX, VTI, target date fund)
  • Set the dollar amount and frequency (e.g., $500 monthly)
  • Link it to your automatic transfer date

Example flow:

  • 5th of the month: $500 transfers from bank to brokerage
  • 6th of the month: $500 automatically buys FSKAX

Option 2: Manual with reminders (backup plan)

  • If your brokerage doesn't have great auto-invest features
  • Set a calendar reminder to log in and buy once a month
  • Not ideal, but better than nothing

For multiple funds:

  • Some brokerages let you split: 60% to Fund A, 30% to Fund B, 10% to Fund C
  • Or you can set up separate automatic investments for each fund

6. Automating taxable brokerage accounts

The process is identical to IRAs:

  1. Set up recurring transfer from bank to taxable brokerage
  2. Set up automatic investment into your chosen funds

The only difference is there's no contribution limit, so you can invest as much as you want.

When to prioritize taxable accounts:

  • After maxing 401(k) match and Roth IRA
  • If you're saving for goals before age 59½ (early retirement, house, etc.)
  • If you want maximum flexibility

7. The complete automation blueprint

Here's what a fully automated investing system looks like:

Every paycheck (automatic):

  • 10-15% goes to 401(k) before you see it
  • 401(k) automatically buys your chosen funds

Every month (automatic):

  • 5th: $500 transfers from checking to Roth IRA
  • 6th: $500 automatically invests in FSKAX (or your chosen fund)
  • 15th: $300 transfers from checking to taxable brokerage
  • 16th: $300 automatically invests in VTI (or your chosen fund)

Your job:

  • Check once every 3-6 months that everything is running smoothly
  • Rebalance once a year if needed
  • Increase contributions when income goes up

That's it. The system runs itself.

8. How to handle raises and bonuses

When your income increases, you have a choice:

  • Let lifestyle inflation eat it all
  • Redirect some or all of it to investing

My approach:

  • Get a raise → immediately increase 401(k) contribution by 1-2%
  • Or increase automatic IRA transfers by $50-100/month
  • This "pay raise to future me" strategy compounds fast

For bonuses:

  • Take 50-75% and make a one-time investment
  • Use the rest for fun or current goals
  • This way you get the dopamine hit now and the long-term benefit later

9. What if I can't afford much right now?

Start small. The habit matters more than the amount.

Even if you can only do:

  • $50/month to a Roth IRA
  • 3% to your 401(k)

That's still building the system. Once the automation is in place, increasing it later is just changing a number.

The key is this:

  • Automate something, even if it's small
  • Get comfortable seeing money leave your account
  • Let your lifestyle adjust around what's left
  • Increase gradually as income grows or debt clears

People who automate $100/month for 20 years beat people who plan to invest $500/month but never actually do it.

10. Common automation mistakes to avoid

Mistake 1: Automating transfers but not investing

  • Money piles up in cash at the brokerage
  • You're not actually invested
  • Fix: Set up automatic fund purchases

Mistake 2: Setting it and literally never checking

  • Automation doesn't mean total neglect
  • Check quarterly or semi-annually that it's running
  • Make sure nothing broke or changed

Mistake 3: Overcommitting and then quitting

  • You automate $1,000/month but can't sustain it
  • You turn it off and never turn it back on
  • Better to start with $300 and increase gradually

Mistake 4: Not coordinating with paydays

  • Transfers hit before your paycheck arrives
  • Overdrafts or bounced transfers
  • Fix: Schedule everything 2-3 days after payday

11. The behavioral edge of automation

Automation removes three major failure points:

  1. Decision fatigue
    • You don't have to decide "should I invest this month?"
    • The system decides for you
  2. Market timing temptation
    • You can't wait for "better prices" because it happens automatically
    • You buy whether the market is up or down
    • This is exactly what you want for long-term wealth building
  3. Lifestyle creep
    • Money goes to investments before you can spend it
    • You build your lifestyle around what's left
    • This forces you to "pay yourself first" without willpower

The people who succeed long-term aren't the ones with the most willpower. They're the ones who built a system that runs regardless of motivation.

12. Putting it all together

If you take one thing from this page, it's this:

Wealth building is not about perfect decisions. It's about a system that keeps running.

Your automated investing system should:

  • Move money from paychecks to investments without you touching it
  • Buy the same broad index funds every month
  • Keep running whether the market is up 30% or down 30%
  • Require minimal maintenance (quarterly check-ins at most)

Set it up once. Let it run for decades. That's how you build wealth while living your life.