Where the $1.1M Number Comes From

Apply the traditional 4% rule to $44,000 of annual portfolio income (the gap between $66,800 of total spending and a typical $22,800 annual Social Security benefit), and you arrive at roughly $1.1M of required savings. The math is clean. The assumptions inside it deserve more scrutiny than they usually get.

That baseline assumes: (1) Social Security benefits land near the average claim, (2) the household uses the 4% withdrawal rule (which is a 30-year-horizon planning baseline, not a guarantee), (3) the cost of living matches the Arizona median, (4) housing is settled — paid-off home or stable rent, (5) healthcare is reasonable, and (6) the portfolio is roughly balanced. Change any of these and the number moves.

How the Number Changes by City

Cost of living varies meaningfully across Arizona retirement destinations:

• Tucson: Roughly 10–15% below the Arizona median. A $55,000–$60,000 annual budget supports a comfortable retirement for many households. Required savings: closer to $900K–$1.0M.
• Surprise / Sun City / Sun City West: Near or slightly below the Arizona median. The $1.1M baseline applies cleanly.
• Peoria, Chandler, Gilbert: Slightly above median. $1.2M–$1.3M is more realistic.
• Scottsdale: Roughly 25–35% above the Arizona median. Required savings often $1.4M–$1.8M for a comparable lifestyle.
• Prescott / Sedona: Above median due to housing costs and limited supply. $1.3M–$1.6M typical.

Real Scenario: $1M in Tucson

A married couple, both 67, with $1M split as $700K IRA, $200K Roth, $100K taxable. Combined Social Security: $48,000/year at FRA. They own a paid-off home in Tucson. Target spending: $58,000.

Social Security covers $48K. The portfolio gap is $10K — well under 1.5% of the $1M balance. The plan is comfortable. Even with conservative assumptions and a difficult opening decade, the household has substantial margin for irregular expenses.

Tucson with $1M and meaningful Social Security, paid-off housing, and modest spending is a structurally strong plan.

Real Scenario: $1.1M in Scottsdale

The same couple, the same $1.1M, but in Scottsdale with a $2,400/month mortgage and $90,000/year of target spending.

Social Security covers $48K. The portfolio gap is $42K — that's a roughly 3.8% draw rate. Borderline sustainable in the long run. Add a couple of bad market years early and the plan strains.

The same $1.1M that's comfortable in Tucson is uncomfortable in Scottsdale with a mortgage. The number itself didn't change — the structure around it did.

The Tax Adjustment for Arizona

Arizona's tax structure typically reduces the income requirement by 2–6% versus comparable retirement in higher-tax states. The two main reasons: no state tax on Social Security (unlike the dozen+ states that tax it) and the 2.5% flat state income tax (lower than most states).

For a household drawing $50K/year from a pre-tax IRA plus $48K of Social Security, moving from California to Arizona saves roughly $5,000–$8,000 a year in state tax alone. Over a 25-year retirement, that compounds into $150,000–$250,000 — a real number that changes the “how much do I need” calculation.

The Variables That Move the Number

• Housing status: Paid-off home reduces required income by $1,500–$3,000+/month.
• Social Security claim age: Deferring to 70 raises lifetime benefit and reduces portfolio requirement.
• Account type mix: Same balance produces different spendable income depending on Roth vs. pre-tax.
• Healthcare needs: Pre-65 retirees need to budget healthcare separately; chronic conditions change the number significantly.
• Lifestyle: Travel, dining, hobbies, and family support all matter more than most households model.
• Spending flexibility: A household willing to trim 10% in a bad year can sustain a higher initial withdrawal rate than one that can't.

The Healthcare Adjustment

The $1.1M baseline assumes the household is at or past Medicare age. For pre-Medicare retirees in Arizona, the required savings should be increased to account for ACA premium costs and the management of modified AGI to preserve subsidies. This typically adds $5K–$15K of annual cost in the bridge years to age 65 — meaning a pre-Medicare retiree might need an additional $100K– $300K of savings to absorb the bridge expense without straining the long-term plan.

Common Mistakes

• Using a national or generic retirement number without adjusting for Arizona's lower tax burden.
• Forgetting that the $1.1M baseline assumes Social Security is available and claimed at FRA.
• Comparing pre-tax balances directly to after-tax spending targets.
• Picking the wrong city for the budget (Scottsdale on a Tucson number).

The Bottom Line

$1.1M is a reasonable directional baseline for a comfortable Arizona retirement. Whether it's enough for you depends on the structure: which city, what housing situation, what spending target, what Social Security, and what account mix.

The number gets you started. The structure gets you through.