South Dakota Tax Estimator

There is no single South Dakota property tax rate

South Dakota does not have one rate — it has 65. They run from 0.44% in Oglala Lakota County to 2.23% in Todd County, with the median county at 1.08%. That is the first thing to understand before comparing South Dakota against anywhere else: a state average is an average of things that do not resemble each other.

The gap between the cheapest and dearest county here is more than 5.1 to one on the same house. A spread that wide is not explained by state law, because state law is identical throughout — it comes from the local mix: how much of the school budget the state funds rather than the district, whether there is commercial or industrial value to spread the burden across, and how fast home values have moved relative to the budgets those values must fund.

On a $400,000 home the difference between the two ends of South Dakota is roughly $7,157 a year, every year you own it. Pick your county below rather than reasoning from the state figure.

How South Dakota compares with the rest of the country

South Dakota sits above the national picture. Its median county charges 1.08% against a national median of 0.84%, so an owner here generally pays more than in most of the United States on the same house.

For scale, US effective rates run from about 0.08% to 3.64% across the 3,132 counties with published data — more than twenty to one on the same property, decided almost entirely by which side of a line it stands on.

A more useful measure than the rate is what it takes out of a local income. Across South Dakota counties the median bill averages about 2.6% of median household income.

The South Dakota rules that decide your bill

Start with what is actually taxed, because in South Dakota it is not the market value. South Dakota assesses at full and true value and then equalizes to 85% of it for tax purposes. A home at $230,000 of full and true value carries $195,500 of taxable value. Filing the Owner-Occupied Certificate by 15 March also lowers the school general fund levy on it, and that is a separate step people miss. On a $400,000 home that is roughly $340,000 of taxable value before any exemption comes off.

South Dakota’s Assessment Freeze locks your assessed value in place from age 65, or on disability, with income under $56,595 single or $66,885 for a multi-person household, five years of state residency, 200 days in the house, and a property value below $514,500. Its separate "Homestead Exemption" is not an exemption at all — it DEFERS the tax as a lien that must be repaid with interest before the property can be sold, and its income limits are far tighter at $18,470 and $23,087. Applications close 1 April.

These are South Dakota rules and they apply in every county in the state. What varies locally is the rate, not the relief — so if you qualify and have not claimed it, your county assessor is where that gets fixed, not the state.

Property tax and income tax in South Dakota, together

South Dakota does not tax wage income at all. That is genuinely valuable, and it is also only half the ledger — the money for schools, roads and county services has to come from somewhere, and property tax is usually where.

Here the trade is visible: no income tax, and a median county rate of 1.08% against a national median of 0.84%. A high earner generally comes out ahead on that swap. Someone with a large house and a modest income often does not, and a retiree on a fixed income least of all.

Either way, compare the two together. A state-versus-state comparison on one tax alone routinely points the wrong way.

What a house actually costs in South Dakota, at four prices

At the median county rate of 1.08%, a $250,000 home carries about $2,694 a year, a $400,000 home $4,310, a $600,000 home $6,464, and a $900,000 home $9,697. Property tax is close to linear in value, which income tax is not — doubling the house roughly doubles the bill.

But the median is the wrong number to plan with, because you do not buy in the median county. That same $600,000 house costs $2,618 a year in Oglala Lakota County and $13,354 in Todd County — a difference of $10,736 every year, on identical property, under identical state law.

Over a ten-year hold that gap compounds to $107,358 before any rate increase. It is larger than most buyers' entire closing-cost budget, and it is decided by which side of a line on a map the house sits on. That is the case for looking up the county rather than the state.

One caution on all four figures: they apply the effective rate to the full purchase price. Where the state assesses at a fraction of market value, or caps how fast the assessed value can climb, your first-year bill and your fifth-year bill will differ from this — the sections below say exactly how, for South Dakota.

Where each South Dakota county sits, in four groups

Ranking South Dakota's 65 counties by effective rate puts the quarter boundaries at 0.95% and 1.20%, with the median at 1.08%. Jerauld County sits on the lower boundary and Brown County on the upper — anything below the first is cheap for this state, anything above the second is expensive for it, and the middle half falls between the two.

On a $156,500 house those boundaries are $1,493 and $1,877 a year: a difference of $383 between the bottom quarter and the top, ignoring the extremes at either end entirely. Half of all South Dakota counties fall inside that band, which is the honest answer to "what does property tax cost here" — a range, not a number.

Against the country, 6 of 65 South Dakota counties sit below the national median of 0.84% and 59 above it. A state that straddles the national median this way cannot be summarised as cheap or expensive — the county decides it, which is the whole argument for looking one up.

Two cautions on reading the quartiles. They rank rates, not bills: a low rate on an expensive house can exceed a high rate on a cheap one, and the counties at the bottom of this ranking often have the highest home values. And they rank the county, while your bill is the sum of every district reaching your parcel — a house inside a city or a high-spending school district pays above its county's figure.

Why South Dakota rates differ by 5.1× under identical law

Property tax runs backwards from every other tax you pay. Income tax starts with a rate and produces revenue; property tax starts with the revenue a district needs, divides it by the total assessed value in the district, and the rate is whatever falls out of that division. Nobody sets 1.08% — it is a quotient.

Two things move it, and only two: the budget on top and the tax base underneath. That is why a rate can fall while your bill rises — if assessed values across the district climb faster than the budget, the rate must drop to collect the same money, and the owner whose property gained the most value still pays more. It is also why a district losing its largest employer sees rates rise with no vote and no new spending.

The base is what explains South Dakota's spread. Oglala Lakota County raises what it needs at 0.44%; Todd County needs 2.23% for comparable services. The usual difference is not extravagance — it is commercial, industrial or utility value that spreads the load away from houses, a district where it is present and one where houses carry nearly all of it.

School funding is the other half. Where a state funds most of education centrally, local rates converge; where districts raise it themselves, they diverge, and the poorest base needs the highest rate to fund the same school. Nationally, counties run from 0.46% at the tenth percentile to 1.57% at the ninetieth for precisely this reason.

Market value, assessed value and the number on your bill

South Dakota assesses at full and true value and then equalizes to 85% of it for tax purposes. A home at $230,000 of full and true value carries $195,500 of taxable value. Filing the Owner-Occupied Certificate by 15 March also lowers the school general fund levy on it, and that is a separate step people miss.

In practice: a $156,500 house in South Dakota is taxed on roughly $133,025 of assessed value, not on $156,500. The published millage is applied to that smaller figure, which is why a headline rate that looks alarming next to another state often is not — the two are being applied to different bases.

This is exactly why every rate on this site is an EFFECTIVE rate: tax actually paid divided by the home's market value. It is the only figure that survives comparison across state lines, because it has the assessment ratio, the exemptions and the millage already folded into it. A nominal millage does not.

It also explains a common shock. Assessment ratios and reassessment cycles differ, so a state can reassess every year, every three years, or on sale only. Where reassessment is infrequent, the correction when it finally arrives is not a rate increase — it is several years of market movement landing at once, and appealing the rate rather than the value is arguing the wrong point.

Appealing a South Dakota assessment: what it is worth

You cannot appeal the tax rate — that is set by budget votes you have no standing to challenge individually. What you can appeal is the assessor's opinion of your property's value, and that is a factual claim you can be right or wrong about.

The arithmetic decides whether it is worth your afternoon. On the state's median home of $156,500, the bill runs about $1,686 a year. A 10% reduction in assessed value is worth roughly $169 a year, and because the corrected value carries forward it is nearer $843 across five years. Under $60 a year, the paperwork rarely pays; over $400, it usually does.

What wins is comparable sales, not hardship. Three to five recent arm's-length sales of genuinely similar properties — same neighbourhood, similar size, age and condition — near your valuation date. What loses is what the bill does to your budget, what the previous owner paid, or that the rate went up. Assessors decide value; none of those speak to value.

Also check the record itself before arguing valuation, because errors are commoner than contested opinions: square footage that includes an unfinished basement, a bathroom that does not exist, a garage counted twice, land area from a survey predating a lot split. A factual correction is usually granted without a hearing.

The deadline in South Dakota: Applications close 1 April. Miss it and there is generally no remedy until the following cycle, whatever the merits — property tax appeal windows are short and strictly applied, and they typically start from the date the notice was mailed rather than the date you opened it.

Relief for older owners in South Dakota

South Dakota’s Assessment Freeze locks your assessed value in place from age 65, or on disability, with income under $56,595 single or $66,885 for a multi-person household, five years of state residency, 200 days in the house, and a property value below $514,500. Its separate "Homestead Exemption" is not an exemption at all — it DEFERS the tax as a lien that must be repaid with interest before the property can be sold, and its income limits are far tighter at $18,470 and $23,087. Applications close 1 April.

This matters more than the headline rate for anyone retiring in place. Property tax is the one major tax that does not fall when your income does — the house is worth what it is worth whether you are earning $120,000 or drawing $38,000 from a pension, and a bill that was 3% of income while working can be 9% of it afterwards.

Relief of this kind almost always has to be applied for, is usually income-tested, and in several states takes the form of a deferral rather than a discount: the tax is postponed and becomes a lien recovered when the property is sold or transferred. A deferral solves a cash-flow problem and reduces what heirs receive. Both can be the right choice; they are not the same choice, and the paperwork rarely spells out which one you are signing.

Check it against the income-tax side too. A state that treats retirement income generously and property harshly, or the reverse, can come out very differently once both are counted — which is what the comparison further down this page is for.

The ten-year figure, which is the one that decides a purchase

A single year's property tax is a number people accept without much thought. The decade is the number that changes decisions, because unlike a mortgage it never amortises away and unlike income tax it does not fall when your income does.

On South Dakota's median home value of $156,500, held ten years with assessed value rising 4% a year, the median county collects about $20,244. The cheapest county in the state collects $8,200 over the same period and the dearest $41,820 — a spread of $33,620 on identical property, decided entirely by location.

The same house at the national median rate of 0.84% would run $15,729 over ten years, so the median South Dakota county costs about $4,515 more across the decade than a typical American county would.

Set that against the mortgage to see the weight of it. On a $156,500 purchase the ten-year property tax bill in the median county is roughly 16% of the amount financed at 80% loan-to-value — before insurance, before maintenance, and before any millage increase. It is the largest recurring cost of ownership after interest, and the only one that a district can raise without asking you.

Treat the figure as an order of magnitude rather than a forecast. It assumes the county's current effective rate holds, and rates move with district budgets and with reassessment cycles. What it is reliable for is the comparison: the gap between two counties is far more durable than either absolute number.

How the bill is paid, and what happens if it is not

Most owners with a mortgage never pay this directly. The servicer collects roughly $141 a month alongside principal and interest on the state's median bill, holds it in escrow, and pays the county when it falls due. The consequence is that a rise reaches you as a change in your monthly payment months after the fact, with no obvious connection to the assessment notice that caused it.

Read the annual escrow analysis when it arrives. It shows the bill actually paid, and it is the cheapest way to catch an assessment you would have appealed had you noticed — by the time the payment changes, the appeal window for that year has usually closed.

Owners without a mortgage pay the county directly, generally in two instalments; South Dakota's calendar is set out above. Late payment carries interest set by statute rather than by the county, and it is not small — rates in the region of 1% a month are common, which is above most credit card debt on an annualised basis.

Unpaid property tax is also secured against the house itself, which is what separates it from every other tax. States permit a tax lien, and eventually a tax sale, at the end of a statutory redemption period. It is slow and heavily noticed, so it is nearly always avoidable — but the mechanism means an unpaid property tax bill can never simply be written off the way an unpaid income tax debt sometimes is.

Five ways a South Dakota property tax estimate goes wrong

Using the state average. South Dakota has 65 counties with published rates and they do not resemble one another. The state figure is an average of things that are not alike, and applying it to a house in Todd County understates the bill by $1,797 a year.

Applying the millage to the market price. Where assessed value is a fraction of market value, multiplying the published rate by the purchase price overstates the result — sometimes by half. Use an effective rate, which already accounts for the base.

Assuming exemptions are automatic. A homestead exemption generally has to be claimed after purchase, and nothing on the bill announces that it is missing. Buyers who never file pay the unexempted figure for as long as they own.

Comparing property tax in isolation. South Dakota levies no income tax, which is precisely why its property rates read high. Comparing only this tax against a state that taxes income makes South Dakota look expensive when the total may well be lower.

Trusting the listing's tax line. It is the seller's bill, carrying their tenure and their exemptions. Where a sale triggers reassessment it is not a forecast of yours, and it is the single most common reason a first full-year bill arrives higher than budgeted.

How a South Dakota property tax bill is put together

Your bill is not one rate. It is the sum of every authority that reaches your parcel — the county, the school district, the city or township, and often a fire, library or water district — each setting its rate separately and all of them added together. That is why two houses of identical value on opposite sides of a district line inside the same county owe different amounts, and both figures are correct.

The effective rates on this site are a different and more comparable thing: the median tax actually paid in a county divided by its median home value, from US Census data. That number can be compared across state lines. A millage rate cannot, because assessment practice differs from state to state — and South Dakota, taxing 85% of value, is a good example of why.

Use the county figure to compare places and to sanity-check an escrow estimate. Use your assessor's roll to find out what you owe.

South Dakota property tax questions

What is the average property tax rate in South Dakota?

The median South Dakota county has an effective rate of 1.08%, but the state average hides a lot: rates run from 0.44% in Oglala Lakota County to 2.23% in Todd County. Use your own county's figure rather than the state one.

Which South Dakota county has the lowest property tax?

Oglala Lakota County, at 0.44%. The highest is Todd County at 2.23% — a difference of about 5.1 to one on the same house.

How much is property tax on a $400,000 home in South Dakota?

At the median county rate of 1.08%, roughly $4,310 a year, or about $359 a month once it is in escrow. In Oglala Lakota County it would be nearer $1,746 and in Todd County nearer $8,903.

Does South Dakota have an income tax too?

No. South Dakota does not tax wage income, which is part of why property tax carries more of the local funding burden here.

Do I need a parcel number to estimate South Dakota property tax?

No. Your county assessor's own estimator generally asks for one, which is fine if you already own the property and useless if you are deciding whether to buy it. This works from the home value instead — though for the binding figure, the assessor remains the authority.