DIY vs Hire Deck Staining: Which Costs Less in 2026?

Is $450.00 the right DIY cost for a 400 sq ft deck?

On the defaults — a 400-square-foot deck, a $2.50-a-square-foot pro quote, $50.00-a-gallon stain covering 200 square feet a gallon, $50.00 of supplies and 10 hours of your time at $30.00 an hour — staining the deck yourself costs $450.00, or $1.13 a square foot, against a $1,000.00 pro quote, so DIY wins by $550.00. The DIY cost is the stain plus the supplies plus your hours valued at your hourly rate; the pro cost is the deck area times the pro rate per square foot. A professional job typically costs $1.50–$4.00 per square foot, with $2.50 a common middle quote, and the price usually includes cleaning and prep. A gallon of deck stain typically costs $30–$80, with $50 a common price, and covers about 150–300 square feet. Supplies run about $40–$60, with $50 a common figure. A first-timer should allow about 8–12 hours for a 400-square-foot deck.

Four things about the model are worth stating plainly. First, the stain costs $100.00 — 400 ÷ 200 = 2 gallons × $50.00. Second, the DIY cost is $450.00 — $100.00 of stain + $50.00 of supplies + 10 × $30.00 of your time. Third, the pro cost is $1,000.00 — 400 × $2.50. And fourth, DIY wins by $550.00 — but the answer turns on your hourly value: at $85.00 an hour the two ways tie, and at $86.00 an hour hiring wins; all listed in Accuracy & limitations.

The worked example, line by line

Setup: 400 sq ft deck, pro rate $2.50/sq ft, stain $50.00/gal covering 200 sq ft/gal, supplies $50.00, 10 hours at $30.00 an hour.

Line 1 — the stain. The stain costs 400 ÷ 200 = 2 gallons × $50.00 = $100.00.

Line 2 — the DIY cost. The DIY cost is $100.00 + $50.00 + 10 × $30.00 = $450.00, or $450.00 ÷ 400 = $1.13 per square foot.

Line 3 — the pro cost. The pro cost is 400 × $2.50 = $1,000.00, or $2.50 per square foot.

Line 4 — the winner. $1,000.00 − $450.00 = $550.00 — DIY wins by $550.00.

Line 5 — the check. $100.00 + $50.00 + $300.00 = $450.00, the DIY cost; and $450.00 + $550.00 = $1,000.00, the pro quote.

Every branch, checked

Pro rate $1.00/sq ft: DIY $450.00 ($1.13/sq ft); pro $400.00 ($1.00/sq ft) — Hiring wins by $50.00 — With a $1.00-a-square-foot quote the pro total is $400.00 — hiring wins by $50.00, the only branch where hiring wins.

Deck area 800 sq ft: DIY $550.00 ($0.69/sq ft); pro $2,000.00 ($2.50/sq ft) — DIY wins by $1,450.00 — With an 800-square-foot deck the DIY cost is $550.00 — the stain doubles to $200.00, but the hours stay at 10 — and DIY wins by $1,450.00.

Hourly value $50: DIY $650.00 ($1.63/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $350.00 — With your time at $50.00 an hour the DIY cost is $650.00 — DIY still wins by $350.00.

Pro rate $3.50/sq ft: DIY $450.00 ($1.13/sq ft); pro $1,400.00 ($3.50/sq ft) — DIY wins by $950.00 — With a $3.50-a-square-foot quote the pro total is $1,400.00 — DIY wins by $950.00.

Supplies $100: DIY $500.00 ($1.25/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $500.00 — With $100.00 of supplies the DIY cost is $500.00 — DIY wins by $500.00.

Hours 16: DIY $630.00 ($1.58/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $370.00 — With 16 hours the DIY cost is $630.00 — DIY wins by $370.00.

Stain price $80/gal: DIY $510.00 ($1.28/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $490.00 — With stain at $80.00 a gallon the stain costs $160.00 and the DIY cost is $510.00 — DIY wins by $490.00.

The reverses, worked backwards

Smallest pro rate (to the cent) where DIY wins: At the displayed $1.13 the figures are DIY $450.00 ($1.13/sq ft); pro $452.00 ($1.13/sq ft) — DIY wins by $2.00. At the displayed $1.13 the pro total is $452.00 and DIY wins by $2.00. At $1.12/sq ft the pro total is $448.00 and hiring wins by $2.00 — the exact tie is at $1.125/sq ft, so $1.13 is the smallest rate (to the cent) where DIY wins.

Smallest whole-dollar hourly value where hiring WINS: At the displayed $86.00 the figures are DIY $1,010.00 ($2.53/sq ft); pro $1,000.00 ($2.50/sq ft) — Hiring wins by $10.00. At the displayed $86.00 the DIY cost is $1,010.00 and hiring wins by $10.00. At $85/hour the DIY cost is $1,000.00 — an exact tie — so $86.00 is the smallest whole-dollar hourly value where hiring wins.

Largest whole-dollar hourly value where DIY still wins by at least $200.00: At the displayed $65.00 the figures are DIY $800.00 ($2.00/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $200.00. At the displayed $65.00 the DIY cost is $800.00 and DIY wins by $200.00 exactly. At $66/hour the DIY cost is $810.00 and DIY wins by $190.00 — below $200 — so $65.00 is the largest whole-dollar hourly value where DIY still wins by at least $200.00.

Smallest pro rate (to the cent) where DIY wins by at least $500.00: At the displayed $2.38 the figures are DIY $450.00 ($1.13/sq ft); pro $952.00 ($2.38/sq ft) — DIY wins by $502.00. At the displayed $2.38 the pro total is $952.00 and DIY wins by $502.00. At $2.37/sq ft the pro total is $948.00 and DIY wins by $498.00 — below $500 — so $2.38 is the smallest rate (to the cent) where DIY wins by at least $500.00. The exact rate is 400 × rate − 450 ≥ 500, so rate ≥ 2.375.

Smallest whole-dollar supplies where hiring WINS: At the displayed $601.00 the figures are DIY $1,001.00 ($2.50/sq ft); pro $1,000.00 ($2.50/sq ft) — Hiring wins by $1.00. At the displayed $601.00 the DIY cost is $1,001.00 and hiring wins by $1.00. At $600 supplies the DIY cost is $1,000.00 — an exact tie — so $601.00 is the smallest whole-dollar supplies where hiring wins.

Smallest whole-dollar stain price where hiring WINS: At the displayed $326.00 the figures are DIY $1,002.00 ($2.51/sq ft); pro $1,000.00 ($2.50/sq ft) — Hiring wins by $2.00. At the displayed $326.00 the stain costs $652.00, the DIY cost is $1,002.00 and hiring wins by $2.00. At $325/gal the stain cost is $650.00 and the DIY cost is $1,000.00 — an exact tie — so $326.00 is the smallest whole-dollar stain price where hiring wins.

What the defaults assume

The defaults are a 400 sq ft deck, a $2.50/sq ft pro rate, $50.00/gal stain covering 200 sq ft/gal, $50.00 of supplies, 10 hours at $30.00 an hour — DIY $450.00 ($1.13/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $550.00. With Pro rate $1.00/sq ft, DIY $450.00 ($1.13/sq ft); pro $400.00 ($1.00/sq ft) — Hiring wins by $50.00. With Deck area 800 sq ft, DIY $550.00 ($0.69/sq ft); pro $2,000.00 ($2.50/sq ft) — DIY wins by $1,450.00. With Hourly value $50, DIY $650.00 ($1.63/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $350.00. With Pro rate $3.50/sq ft, DIY $450.00 ($1.13/sq ft); pro $1,400.00 ($3.50/sq ft) — DIY wins by $950.00. With Supplies $100, DIY $500.00 ($1.25/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $500.00. With Hours 16, DIY $630.00 ($1.58/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $370.00. With Stain price $80/gal, DIY $510.00 ($1.28/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $490.00. With Deck area 0 sq ft, DIY $350.00 (—/sq ft); pro $0.00 (—/sq ft) — Hiring wins by $350.00. With Deck area 200 sq ft, hours 5, DIY $250.00 ($1.25/sq ft); pro $500.00 ($2.50/sq ft) — DIY wins by $250.00. With Hourly value $0, DIY $150.00 ($0.38/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $850.00. With Supplies $0, DIY $400.00 ($1.00/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $600.00. With Pro rate $1.13/sq ft, DIY $450.00 ($1.13/sq ft); pro $452.00 ($1.13/sq ft) — DIY wins by $2.00. With Hours 0, DIY $150.00 ($0.38/sq ft); pro $1,000.00 ($2.50/sq ft) — DIY wins by $850.00. With Pro rate $5.00/sq ft, DIY $450.00 ($1.13/sq ft); pro $2,000.00 ($5.00/sq ft) — DIY wins by $1,550.00.

A note on the zero-deck edge: at 0 sq ft the DIY cost is $350.00 of supplies and hours bought for a deck that does not exist — and the per-square-foot costs show “—” with a note, never Infinity or NaN.

A note on the rounding: at the $1.13/sq ft rate the per-square-foot figures round the same — both sides show $1.13 per square foot, DIY $450.00 and pro $452.00 — while the totals differ by $2.00. The per-square-foot figures are computed in whole cents, so the displayed value is the half-up value: 450 ÷ 400 = 1.125 rounds to $1.13.

Output · formula · meaning

Who uses this

• The homeowner with a 400 sq ft deck: they learn staining it themselves costs $450.00 against a $1,000.00 quote — and they check the $1.13 reverse to see the smallest pro rate where DIY still wins.
• The homeowner whose time is pricey: they learn at $85.00 an hour the two ways tie exactly — and they check the $86.00 reverse to see where hiring takes over.
• The homeowner with a big deck: they learn an 800 sq ft deck costs $550.00 to stain themselves against a $2,000.00 quote — and they check the $65.00 reverse to see how much their time can be worth before DIY stops winning by $200.00.
• The homeowner facing a $2.38 quote: they learn DIY wins by $502.00 at that rate — and they check the $326.00 reverse to see how expensive stain must get before hiring wins.

Accuracy & limitations

The math is first-principles: the stain is the deck area divided by the coverage times the stain price per gallon; the DIY cost is the stain plus the supplies plus the hours times the hourly value; the pro cost is the deck area times the pro rate per square foot; the winner is the lower total. The per-square-foot figures are computed in whole cents, so the displayed value is the half-up value — 450 ÷ 400 = 1.125 rounds to $1.13. The reverses are judged on the UNROUNDED totals: at $1.12/sq ft the pro total is $448.00, below the $450.00 DIY cost, so hiring wins. What the model cannot do is price your deck: the $1.50–$4.00 pro range and the $30–$80 stain range are typical figures, not quotes; a deck that needs sanding, repairs or two coats costs more either way; and the hourly value is yours to set — an hour of a Saturday is not worth the same to everyone. Use it to see which side wins on your numbers — then get a real quote before you buy stain.

Frequently asked questions